Air conditioner

Abstract

Disclosed is an air conditioner, comprising a housing, an indoor heat exchanger, a second fan, a volute casing, a first fan, a first motor and a connecting shaft. The housing is internally provided with a first inner chamber and a second inner chamber in the length direction. The indoor heat exchanger and the second fan are arranged in the first inner chamber, and the second fan is located below the indoor heat exchanger. The volute casing is arranged in the second inner chamber. The first fan is arranged in the volute casing. The first motor is arranged on the side of the second fan away from the first fan. The first motor is configured to drive the second fan to rotate. Two ends of the connecting shaft are coaxially connected to the first fan and the second fan, respectively. The connecting shaft is integrally formed with the first fan and / or the second fan. When the first motor drives the second fan to rotate, the second fan drives the first fan to rotate synchronously by means of the connecting shaft.

Description

air conditioner

[0001] This application claims the following: Application No. CN202322095983.9, filed on August 4, 2023; Application No. CN202322100306.1, filed on August 4, 2023; Application No. CN202322100150.7, filed on August 4, 2023; Application No. CN202322100300.4, filed on August 4, 2023; Application No. CN2023220960, filed on August 4, 2023 31.9; the priority of the Chinese patent applications filed on August 4, 2023, with application number CN202322100166.8; and the priority of the Chinese patent applications filed on August 31, 2023, with application number CN202322368437.8; and the priority of the Chinese patent applications filed on September 28, 2023, with application number CN202322667983.1; and the priority of the Chinese patent applications filed on December 7, 2023, with application number CN202323336080.1, all of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the technical field of air conditioning, and in particular to an air conditioner. Background Art

[0003] Fresh air air conditioner is a healthy and comfortable air conditioner with fresh air function, which uses fans to achieve circulation and ventilation between room air and outdoor air.

[0004] Summary of the Invention

[0005] In one aspect, an air conditioner is provided. The air conditioner includes a housing, an indoor heat exchanger, a second fan, a volute, a first fan, a first motor, and a connecting shaft. The housing has a first inner cavity and a second inner cavity defined along its length. A second air inlet is defined at the top of the housing, and a second air outlet is defined at the front bottom of the housing. The indoor heat exchanger is disposed within the first inner cavity and exchanges heat with air passing through the indoor heat exchanger to form a heat exchange airflow. The second fan is disposed within the first inner cavity, below the indoor heat exchanger. Indoor air, driven by the second fan, enters the housing through the second air inlet and is discharged into the room through the second air outlet after heat exchanged by the indoor heat exchanger. The volute is disposed within the second inner cavity and has a first air inlet and a first air outlet defined thereon. The first fan is disposed within the volute. The first motor is disposed on a side of the second fan, away from the first fan. The first motor is configured to drive the second fan. The connecting shaft is coaxially connected to the first and second fans at both ends. The connecting shaft is integrally formed with the first fan and / or the second fan. When the first motor drives the second fan to rotate, the second fan drives the first fan to rotate synchronously via the connecting shaft. The distance between the end of the first fan facing the second fan and the inner wall of the volute is L1. The axial thickness of the first fan is L2, where L1 = L2 / 5.

[0006] In another aspect, an air conditioner is provided. The air conditioner includes a housing, an indoor heat exchanger, a second fan, a volute, a first fan, a first motor, an end cover, and a connecting shaft. The housing has a first inner cavity and a second inner cavity along its length. A second air inlet is defined at the top of the housing, and a second air outlet is defined at the front bottom of the housing. The indoor heat exchanger is disposed within the first inner cavity and exchanges heat with air passing through the indoor heat exchanger to form a heat exchange airflow. The second fan is disposed within the first inner cavity, below the indoor heat exchanger. Indoor air, driven by the second fan, enters the housing through the second air inlet and is discharged into the room through the second air outlet after heat exchanged by the indoor heat exchanger. The volute is disposed within the second inner cavity and has a first air inlet and a first air outlet. The first fan is disposed within the volute. The first motor is disposed on the side of the second fan facing away from the first fan. The first motor is configured to drive the second fan to rotate. The end cover is disposed on the side of the second fan facing the first fan. The connecting shaft is coaxially connected to the first fan and the end cover at both ends. The connecting shaft, the first fan, and the end cover are integrally formed. When the first motor drives the second fan, the second fan drives the first fan to rotate synchronously via the connecting shaft. The distance between the end of the first fan facing the second fan and the inner wall of the volute is L1. The axial thickness of the first fan is L2, where L1 = L2 / 5. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG1 is an overall structural diagram of a wall-mounted air conditioner according to some embodiments;

[0008] FIG2 is a front view of a wall-mounted air conditioner according to some embodiments;

[0009] FIG3 is a diagram showing the internal structure of a wall-mounted air conditioner according to some embodiments;

[0010] FIG4 is a front view of the internal structure of a wall-mounted air conditioner according to some embodiments;

[0011] FIG5 is a side view of the internal structure of a wall-mounted air conditioner according to some embodiments;

[0012] FIG6 is a cross-sectional view taken along line A1-A1 of FIG5;

[0013] FIG7 is a diagram showing the internal structure of a wall-mounted air conditioner according to some embodiments;

[0014] FIG8 is a partial structural diagram of the interior of a wall-mounted air conditioner according to some embodiments;

[0015] FIG9 is a diagram showing the internal structure of a wall-mounted air conditioner according to some embodiments;

[0016] FIG10 is a partial structural diagram of the interior of a wall-mounted air conditioner according to some embodiments;

[0017] 11 is a diagram of an end portion of a second fan of a wall-mounted air conditioner facing toward a first fan according to some embodiments;

[0018] FIG12 is a cross-sectional view of FIG11 along line B1-B1;

[0019] FIG13 is a structural diagram of a second fan and a first fan of a wall-mounted air conditioner according to some embodiments;

[0020] FIG14 is a front view of a second fan and a first fan of a wall-mounted air conditioner according to some embodiments;

[0021] FIG15 is a cross-sectional view of FIG14 along line C1-C1;

[0022] FIG16 is an overall structural diagram of a wall-mounted air conditioner according to some embodiments;

[0023] FIG17 is a front view of a wall-mounted air conditioner according to some embodiments;

[0024] FIG18 is a diagram showing the internal structure of a wall-mounted air conditioner according to some embodiments;

[0025] FIG19 is a diagram showing the internal structure of a wall-mounted air conditioner according to some embodiments;

[0026] FIG20 is a side view of a wall-mounted air conditioner according to some embodiments;

[0027] FIG21 is a cross-sectional view of FIG20 along line A2-A2;

[0028] FIG22 is a side view of the internal structure of a wall-mounted air conditioner according to some embodiments;

[0029] FIG23 is a cross-sectional view of FIG22 along line B2-B2;

[0030] FIG24 is an enlarged view of the first fan in FIG23;

[0031] FIG25 is a side view of a volute of a wall-mounted air conditioner according to some embodiments;

[0032] FIG26 is a cross-sectional view of FIG25 along line C2-C2;

[0033] FIG27 is a cross-sectional view of a volute of a wall-mounted air conditioner according to some embodiments;

[0034] FIG28 is a cross-sectional view of a volute of a wall-mounted air conditioner according to some embodiments;

[0035] FIG29 is a structural diagram of a first fan of a wall-mounted air conditioner according to some embodiments;

[0036] FIG30 is a structural diagram of a volute of a wall-mounted air conditioner according to some embodiments;

[0037] FIG31 is an exploded view of a volute of a wall-mounted air conditioner according to some embodiments;

[0038] FIG32 is a structural diagram of an indoor unit of an air conditioner according to some embodiments;

[0039] 33 is a structural diagram of a fresh air module, an induced draft fan, and a first motor assembled inside a casing of an air conditioner indoor unit according to some embodiments;

[0040] FIG34 is a structural diagram of the assembly of a fresh air module and a housing in an air conditioner indoor unit according to some embodiments;

[0041] FIG35 is a partial enlarged view of circle A3 in FIG34;

[0042] FIG36 is a structural diagram of the interior of a casing in an air conditioner indoor unit according to some embodiments;

[0043] FIG37 is a partial enlarged view of circle B3 in FIG36;

[0044] FIG38 is a structural diagram of a bearing housing assembled inside a casing in an air conditioner indoor unit according to some embodiments;

[0045] FIG39 is a partial enlarged view of circle C3 in FIG38;

[0046] FIG40 is a structural diagram of the assembly of a fresh air module, a bearing, and a bearing housing in an air conditioner indoor unit according to some embodiments;

[0047] FIG41 is an exploded view of a fresh air module in an air conditioner indoor unit according to some embodiments;

[0048] FIG42 is a structural diagram of a first fan in an air conditioner indoor unit according to some embodiments;

[0049] FIG43 is a structural diagram of a first fan in an air conditioner indoor unit from another angle according to some embodiments;

[0050] FIG44 is a structural diagram illustrating the connection between a first fan and an induced draft fan in an air conditioner indoor unit according to some embodiments;

[0051] FIG45 is a cross-sectional view of a first fan connected to an induced draft fan in an air conditioner indoor unit according to some embodiments;

[0052] FIG46 is a partial enlarged view of circle D in FIG45;

[0053] FIG47 is a partial enlarged view of circle E in FIG45;

[0054] FIG48 is a structural diagram from another angle of the connection between the first fan and the induced draft fan in the indoor unit of the air conditioner according to some embodiments;

[0055] FIG49 is a structural diagram of a connecting shaft in an air conditioner indoor unit according to some embodiments;

[0056] FIG50 is a structural diagram of a switch assembly assembled in a fresh air module of an air conditioner indoor unit according to some embodiments;

[0057] FIG51 is a structural diagram of a bearing in an air conditioner indoor unit according to some embodiments;

[0058] FIG52 is a cross-sectional view of a bearing sleeve in an air conditioner indoor unit according to some embodiments;

[0059] FIG53 is a structural diagram of a bearing ball in an air conditioner indoor unit according to some embodiments;

[0060] FIG54 is a cross-sectional view of an assembly of a bearing and a bearing housing in an air conditioner indoor unit according to some embodiments;

[0061] FIG55 is a structural diagram of a bearing housing and a bearing assembled in an air conditioner indoor unit according to some embodiments;

[0062] FIG56 is a structural diagram of a bearing housing in an air conditioner indoor unit according to some embodiments;

[0063] FIG57 is a structural diagram of a bearing housing in an air conditioner indoor unit according to some embodiments from another angle;

[0064] FIG58 is a structural diagram of an indoor unit of an air conditioner according to some embodiments;

[0065] FIG59 is a structural diagram of the interior of an air conditioner indoor unit according to some embodiments;

[0066] FIG60 is a structural diagram of the interior of an air conditioner indoor unit from another angle according to some embodiments;

[0067] FIG61 is a structural diagram illustrating the assembly of a fresh air module and a housing in an air conditioner indoor unit according to some embodiments;

[0068] FIG62 is a partial enlarged view of the area circled A4 in FIG61;

[0069] FIG63 is a structural diagram of the interior of a casing in an air conditioner indoor unit according to some embodiments;

[0070] FIG64 is a partial enlarged view of the area circled B4 in FIG63;

[0071] FIG65 is a structural diagram of a bearing seat assembled inside a casing in an air conditioner indoor unit according to some embodiments;

[0072] FIG66 is a partial enlarged view of the area circled C4 in FIG65;

[0073] FIG67 is a structural diagram illustrating the connection between a first fan and an induced draft fan in an air conditioner indoor unit according to some embodiments;

[0074] FIG68 is a cross-sectional view of a first fan connected to an induced draft fan in an air conditioner indoor unit according to some embodiments;

[0075] FIG69 is a structural diagram of a fresh air module in an air conditioner indoor unit according to some embodiments;

[0076] FIG70 is a structural diagram of a fresh air module in an air conditioner indoor unit from another angle according to some embodiments;

[0077] FIG71 is an exploded view of a fresh air module in an air conditioner indoor unit according to some embodiments;

[0078] FIG72 is a structural diagram of an assembly of a fixing member and a first fan in an air conditioner indoor unit according to some embodiments;

[0079] FIG73 is a structural diagram of a first fan in an air conditioner indoor unit according to some embodiments;

[0080] FIG74 is a half-section structural diagram of the assembly of a fixing member and a first fan in an air conditioner indoor unit according to some embodiments;

[0081] FIG75 is a half-section structural diagram of the assembly of the first fan, the first volute, and the fixing member in the indoor unit of the air conditioner according to some embodiments;

[0082] FIG76 is a structural diagram of a fixing member in an air conditioner indoor unit according to some embodiments;

[0083] FIG77 is a structural diagram of a fixing member in an air conditioner indoor unit according to some embodiments from another angle;

[0084] FIG78 is a half-section structural diagram of a fixing member in an air conditioner indoor unit according to some embodiments;

[0085] FIG79 is a structural diagram of a bearing in an air conditioner indoor unit according to some embodiments;

[0086] FIG80 is a cross-sectional view of a bearing in an air conditioner indoor unit according to some embodiments;

[0087] FIG81 is a structural diagram of a bearing ball in an air conditioner indoor unit according to some embodiments;

[0088] FIG82 is a structural diagram of a bearing seat in an air conditioner indoor unit according to some embodiments from another angle;

[0089] FIG83 is a structural diagram of a bearing seat in an air conditioner indoor unit according to some embodiments from another angle;

[0090] FIG84 is a cross-sectional view of an assembly of a bearing and a bearing seat in an air conditioner indoor unit according to some embodiments;

[0091] FIG85 is a structural diagram of an indoor unit of an air conditioner according to some embodiments;

[0092] FIG86 is a structural diagram of the interior of an air conditioner indoor unit according to some embodiments;

[0093] FIG87 is a structural diagram of the interior of an air conditioner indoor unit from another angle according to some embodiments;

[0094] FIG88 is a structural diagram illustrating the assembly of a fresh air module and a housing in an air conditioner indoor unit according to some embodiments;

[0095] FIG89 is a partial enlarged view of the area circled A5 in FIG88;

[0096] FIG90 is a structural diagram of the interior of a casing in an air conditioner indoor unit according to some embodiments;

[0097] FIG91 is a partial enlarged view of the area circled B5 in FIG90 ;

[0098] FIG92 is a structural diagram of a bearing seat assembled inside a casing in an air conditioner indoor unit according to some embodiments;

[0099] FIG93 is a partial enlarged view of circle C5 in FIG92;

[0100] FIG94 is a structural diagram illustrating the connection between a first fan and an induced draft fan in an air conditioner indoor unit according to some embodiments;

[0101] FIG95 is a cross-sectional view of a first fan connected to an induced draft fan in an air conditioner indoor unit according to some embodiments;

[0102] FIG96 is a structural diagram of a fresh air module in an air conditioner indoor unit according to some embodiments;

[0103] FIG97 is a structural diagram of a fresh air module in an air conditioner indoor unit from another angle according to some embodiments;

[0104] FIG98 is an exploded view of a fresh air module in an air conditioner indoor unit according to some embodiments;

[0105] FIG99 is a structural diagram of an assembly of a fixing member and a first fan in an air conditioner indoor unit according to some embodiments;

[0106] FIG100 is a structural diagram of a first fan in an air conditioner indoor unit according to some embodiments;

[0107] FIG101 is a half-section structural diagram of an assembly of a fixing member and a first fan in an air conditioner indoor unit according to some embodiments;

[0108] FIG102 is a structural diagram of a fixing member in an air conditioner indoor unit according to some embodiments;

[0109] FIG103 is a structural diagram of a fixing member in an air conditioner indoor unit according to some embodiments from another angle;

[0110] FIG104 is a half-section structural diagram of a fixing member in an air conditioner indoor unit according to some embodiments;

[0111] FIG105 is a structural diagram of a bearing in an indoor unit of an air conditioner according to some embodiments;

[0112] FIG106 is a cross-sectional view of a bearing in an indoor unit of an air conditioner according to some embodiments;

[0113] FIG107 is a structural diagram of a bearing ball in an air conditioner indoor unit according to some embodiments;

[0114] FIG108 is a structural diagram of a bearing seat in an air conditioner indoor unit according to some embodiments from another angle;

[0115] FIG109 is a structural diagram of a bearing seat in an air conditioner indoor unit according to some embodiments from another angle;

[0116] FIG110 is a cross-sectional view of an assembly of a bearing and a bearing seat in an air conditioner indoor unit according to some embodiments;

[0117] FIG111 is a structural diagram of an indoor unit of an air conditioner according to some embodiments;

[0118] FIG112 is a structural diagram of a fresh air module, an induced draft fan, and a first motor assembled inside a housing of an air conditioner indoor unit according to some embodiments;

[0119] FIG113 is a structural diagram illustrating the assembly of a fresh air module with a housing in an air conditioner indoor unit according to some embodiments;

[0120] FIG114 is a partial enlarged view of the area circled A6 in FIG113;

[0121] FIG115 is a structural diagram of the interior of a casing in an air conditioner indoor unit according to some embodiments;

[0122] FIG116 is a partial enlarged view of the area circled B6 in FIG115;

[0123] FIG117 is a structural diagram of a fresh air module in an air conditioner indoor unit according to some embodiments;

[0124] FIG118 is an exploded view of a fresh air module in an air conditioner indoor unit according to some embodiments;

[0125] FIG119 is a structural diagram of a first fan in an air conditioner indoor unit according to some embodiments;

[0126] FIG120 is a structural diagram of a first fan in an air conditioner indoor unit from another angle according to some embodiments;

[0127] FIG121 is a structural diagram illustrating the assembly of a first fan and a mounting housing in an air conditioner indoor unit according to some embodiments;

[0128] FIG122 is a cross-sectional view of a first fan in an indoor unit of an air conditioner according to some embodiments;

[0129] FIG123 is a structural diagram of a first fan connected to an induced draft fan in an air conditioner indoor unit according to some embodiments;

[0130] FIG124 is a cross-sectional view of a first fan connected to an induced draft fan in an air conditioner indoor unit according to some embodiments;

[0131] FIG125 is a structural diagram of a switch assembly mounted on a fresh air module in an air conditioner indoor unit according to some embodiments;

[0132] FIG126 is a structural diagram of a bearing in an indoor unit of an air conditioner according to some embodiments;

[0133] FIG127 illustrates a structure of a bearing ball in an indoor unit of an air conditioner according to some embodiments;

[0134] FIG128 is a cross-sectional view of a bearing sleeve in an air conditioner indoor unit according to some embodiments;

[0135] FIG129 is a structural diagram illustrating an assembly of a third housing and a bearing in an air conditioner indoor unit according to some embodiments;

[0136] FIG130 is a cross-sectional view of an assembly of a third housing and a bearing in an air conditioner indoor unit according to some embodiments;

[0137] FIG131 is a structural diagram of a third housing in an air conditioner indoor unit according to some embodiments;

[0138] FIG132 is a structural diagram of the third housing of the air conditioner indoor unit from another angle according to some embodiments;

[0139] FIG133 is a cross-sectional view of a third housing in an air conditioner indoor unit according to some embodiments;

[0140] FIG134 is a structural diagram of an indoor unit of an air conditioner according to some embodiments;

[0141] FIG135 is a structural diagram of a fresh air module, an induced draft fan, and a first motor assembled inside a housing of an air conditioner indoor unit according to some embodiments;

[0142] FIG136 is a structural diagram illustrating the assembly of a fresh air module with a housing in an air conditioner indoor unit according to some embodiments;

[0143] FIG137 is a partial enlarged view of the area circled A7 in FIG136;

[0144] FIG138 is a structural diagram of the interior of a casing in an air conditioner indoor unit according to some embodiments;

[0145] FIG139 is a partial enlarged view of the area circled B7 in FIG138;

[0146] FIG140 is a structural diagram of a bearing seat assembled inside a casing in an air conditioner indoor unit according to some embodiments;

[0147] FIG141 is a partial enlarged view of the area circled C7 in FIG140;

[0148] FIG142 is a structural diagram illustrating the assembly of a fresh air module, a bearing, and a bearing seat in an air conditioner indoor unit according to some embodiments;

[0149] FIG143 is an exploded view of a fresh air module in an air conditioner indoor unit according to some embodiments;

[0150] FIG144 is a structural diagram of a first fan in an indoor unit of an air conditioner according to some embodiments;

[0151] FIG145 is a structural diagram of a first fan in an air conditioner indoor unit from another angle according to some embodiments;

[0152] FIG146 is a structural diagram illustrating the assembly of a first fan and a mounting housing in an air conditioner indoor unit according to some embodiments;

[0153] FIG147 is a cross-sectional view of a first fan in an air conditioner indoor unit according to some embodiments;

[0154] FIG148 is a structural diagram of a first fan connected to an induced draft fan in an air conditioner indoor unit according to some embodiments;

[0155] FIG149 is a cross-sectional view of a first fan connected to an induced draft fan in an air conditioner indoor unit according to some embodiments;

[0156] FIG150 is a structural diagram of a switch assembly mounted on a fresh air module in an air conditioner indoor unit according to some embodiments;

[0157] FIG151 is a structural diagram of a bearing in an indoor unit of an air conditioner according to some embodiments;

[0158] FIG152 is a cross-sectional view of a bearing sleeve in an air conditioner indoor unit according to some embodiments;

[0159] FIG153 is a structural diagram of a bearing ball in an air conditioner indoor unit according to some embodiments;

[0160] FIG154 is a structural diagram of a half-section state of an assembled bearing and a bearing seat in an air conditioner indoor unit according to some embodiments;

[0161] FIG155 is a structural diagram of a bearing seat in an air conditioner indoor unit according to some embodiments;

[0162] FIG156 is a structural diagram of a bearing seat in an air conditioner indoor unit according to some embodiments from another angle;

[0163] FIG157 is a structural diagram of a bearing housing in a half-section state in an air conditioner indoor unit according to some embodiments;

[0164] FIG158 is a cross-sectional view of a bearing housing in an air conditioner indoor unit according to some embodiments;

[0165] FIG159 is a structural diagram of the assembly of the third housing and the bearing seat in the indoor unit of the air conditioner according to some embodiments;

[0166] FIG160 is a cross-sectional view of the assembly of the third housing and the bearing housing in the indoor unit of the air conditioner according to some embodiments;

[0167] FIG161 is an overall structural diagram of a wall-mounted air conditioner according to some embodiments;

[0168] FIG162 is a diagram illustrating the internal structure of a wall-mounted air conditioner according to some embodiments;

[0169] FIG163 is a side view of a wall-mounted air conditioner according to some embodiments;

[0170] FIG164 is a front view of the internal structure of a wall-mounted air conditioner according to some embodiments;

[0171] FIG165 is a partial cross-sectional view of the internal structure of a wall-mounted air conditioner according to some embodiments;

[0172] FIG166 is a partial cross-sectional view of the internal structure of a wall-mounted air conditioner according to some embodiments;

[0173] FIG167 is a partial cross-sectional view of the internal structure of a wall-mounted air conditioner according to some embodiments;

[0174] FIG168 is a cross-sectional view of a volute of a wall-mounted air conditioner according to some embodiments;

[0175] FIG169 is a cross-sectional view of a volute of a wall-mounted air conditioner according to some embodiments;

[0176] FIG170 is a cross-sectional view of a volute of a wall-mounted air conditioner after explosion according to some embodiments;

[0177] FIG171 is a cross-sectional view of a volute of a wall-mounted air conditioner after explosion according to some embodiments;

[0178] FIG172 is a cross-sectional view of a volute of a wall-mounted air conditioner according to some embodiments;

[0179] FIG173 is a cross-sectional view of a volute of a wall-mounted air conditioner according to some embodiments;

[0180] FIG174 is a partial cross-sectional view of a first fan of a wall-mounted air conditioner according to some embodiments;

[0181] FIG175 is a partial cross-sectional view of a first fan of a wall-mounted air conditioner according to some embodiments;

[0182] FIG176 is an overall structural diagram of a first fan of a wall-mounted air conditioner according to some embodiments;

[0183] FIG177 is an overall structural diagram of a first fan of a wall-mounted air conditioner according to some embodiments;

[0184] FIG178 is a cross-sectional view of a first fan of a wall-mounted air conditioner according to some embodiments;

[0185] FIG179 is a structural diagram of a first motor of a wall-mounted air conditioner according to some embodiments;

[0186] FIG180 is a structural diagram of a first motor of a wall-mounted air conditioner according to some embodiments;

[0187] FIG181 is a cross-sectional view of a volute of a wall-mounted air conditioner according to some embodiments; and

[0188] Figure 182 is a cross-sectional view of the volute of a wall-mounted air conditioner according to some embodiments. DETAILED DESCRIPTION

[0189] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, rather than all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0190] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0191] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0192] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0193] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0194] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0195] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0196] In the present disclosure, the air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator. In some embodiments, the air conditioner can be a wall-mounted air conditioner, which is described in detail below using a wall-mounted air conditioner as an example. The refrigeration cycle includes a series of processes involving compression, condensation, throttling and evaporation, and supplies cold or heat to the air that has been conditioned and heat exchanged. The compressor compresses the refrigerant gas in a low-temperature and low-pressure state and discharges the refrigerant gas in a high-temperature and high-pressure state. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process. The expansion valve throttles the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure gas-liquid two-phase refrigerant.

[0197] In the evaporator, the refrigerant expands in the expansion valve and absorbs heat, evaporating at a low temperature and pressure. The refrigerant gas then returns to the compressor. The evaporator achieves cooling by utilizing the refrigerant's latent heat of vaporization to exchange heat with the material being cooled.

[0198] An air conditioner consists of an indoor unit and an outdoor unit, with the indoor unit comprising a housing. Throughout the entire cycle, the indoor unit regulates the temperature of the indoor space. The outdoor unit of a wall-mounted air conditioner refers to the portion of the refrigeration cycle that includes the compressor and outdoor heat exchanger. The indoor unit of a wall-mounted air conditioner includes the indoor heat exchanger, and the expansion valve can be provided in either the indoor or outdoor unit. The indoor and outdoor heat exchangers can function as either condensers or evaporators, respectively. When the indoor heat exchanger functions as a condenser, the indoor unit functions as a heater in heating mode. When the indoor heat exchanger functions as an evaporator, the indoor unit functions as a cooler in cooling mode.

[0199] It is worth noting that in the following full text, the first fan may be selected as a fresh air fan, which is configured to drive the flow of outdoor fresh air.

[0200] The first fan may be a fresh air fan configured to drive the flow of outdoor fresh air.

[0201] The first air outlet may be a fresh air outlet, which is configured to output outdoor fresh air into the room through the fresh air outlet.

[0202] The first air inlet may be a fresh air inlet, which is configured so that outdoor fresh air enters the air conditioner indoor unit through the fresh air inlet.

[0203] The first installation space can be selected as a through slot; the second installation space can be selected as a card slot; the third installation space can be selected as a connecting slot; the fourth installation space can be selected as an installation slot; the fifth installation space can be selected as a limit slot; the sixth installation space can be selected as a positioning slot; the seventh installation space can be selected as a groove; and the eighth installation space can be selected as a accommodating slot.

[0204] The second air inlet may be an air-conditioning air inlet, which is configured so that indoor air flow enters the interior of the air-conditioning indoor unit through the air-conditioning air inlet.

[0205] The second air outlet may be an air-conditioning outlet, which is configured so that the airflow after heat exchange is input into the room through the air-conditioning outlet.

[0206] As shown in Figures 1 to 15 , in one embodiment of the wall-mounted air conditioner disclosed herein, the wall-mounted air conditioner includes: a housing 100, an indoor heat exchanger, a second fan 400, a volute 700, a first fan 300, a connecting shaft 110, and a first motor 500. The housing 100 is provided with a first inner cavity and a second inner cavity along its length. A second air inlet 101 is provided at the top of the housing 100, and a second air outlet 102 is provided at the front bottom of the housing 100.

[0207] The indoor heat exchanger is disposed within the first inner cavity, exchanging heat with the air passing through it to form a heat exchange airflow. A second fan 400 is disposed within the first inner cavity, positioned below the indoor heat exchanger. The indoor airflow, driven by the second fan 400, enters the housing 100 through the second air inlet 101, exchanges heat in the indoor heat exchanger, and is then output to the indoor room through the second air outlet 102.

[0208] The volute 700 is disposed in the second inner cavity, and is provided with a first air inlet and a first air outlet 720. The first fan 300 is disposed in the volute 700.

[0209] The first motor 500 is located on a side of the second fan 400 away from the first fan 300. The first motor 500 drives the second fan 400 to rotate. A connecting shaft 110 is coaxially connected to the first fan 300 and the second fan 400 at both ends. The connecting shaft 110 is integrally formed with the first fan 300 and / or the second fan 400. When the first motor 500 drives the second fan 400 to rotate, the second fan 400, via the connecting shaft 110, drives the first fan 300 to rotate synchronously.

[0210] With this solution, the connecting shaft 110 is integrally formed with the first fan 300 and the second fan 400, improving the connection strength between the first and second fans 300, 400. When the first motor 500 drives the second fan 400, the second fan 400 drives the first fan 300 to rotate more stably. This reduces radial runout of the first fan 300 and reduces noise generation.

[0211] In some embodiments, the connecting shaft 110 is integrally formed with the second fan 400 and the first fan 300 through injection molding. This provides the highest structural strength, further improving the strength and stability of the connection between the connecting shaft 110 and the first fan 300, and between the connecting shaft 110 and the second fan 400, thereby preventing vibration during rotation of the first fan 300 and the second fan 400 and reducing noise.

[0212] In some embodiments, the connecting shaft 110 is connected to the second fan 400 and the first fan 300 by welding, which is convenient for production and does not require molds or other parts for connection, thus saving costs.

[0213] In some embodiments, the connecting shaft 110 is made of steel. One end of the connecting shaft 110 is first injection-molded with the first fan 300, and then the end of the connecting shaft 110 away from the first fan 300 is injection-molded with the second fan 400. Because the first fan 300 is shorter in axial length and weighs less than the second fan 400, the connecting shaft 110 is less likely to break after being connected to the first fan 300, facilitating subsequent injection molding of the second fan 400.

[0214] In some embodiments, the material of the connecting shaft 110 is the same as that of the second fan 400 and the first fan 300. The connecting shaft 110, the second fan 400 and the first fan 300 can be directly integrally injection molded, which has high structural strength and is easy to manufacture.

[0215] In some embodiments, first fan 300 includes a first hub 301 and a plurality of first blades 302. The plurality of first blades 302 are spaced apart along the edge of first hub 301. First hub 301 is coaxially disposed with connecting shaft 110. Connecting shaft 110 and first hub 301 are coaxially connected, thereby achieving a connection between first fan 300 and connecting shaft 110 and improving the connection strength.

[0216] In some embodiments, the first hub 301 is generally disc-shaped and hollowed out to facilitate air circulation. The first blades 302 are disposed on the side of the first hub 301 facing the second fan 400, with the spacing between any two adjacent first blades 302 being uniform. The first motor 500 drives the second fan 400, which in turn drives the first hub 301 of the first fan 300 via the connecting shaft 110. The first blades 302 of the first fan 300 are configured to drive airflow.

[0217] In some embodiments, the first hub 301 and each first blade 302 are integrally formed to enhance the overall strength of the first fan 300 .

[0218] In some embodiments, a first boss 130 is coaxially connected to the side of the first hub 301 facing the second fan 400. The connecting shaft 110 is coaxially connected to the first boss 130, and the first boss 130 is integrally formed with the first hub 301 and the connecting shaft 110. The first boss 130 is integrally formed with the connecting shaft 110 to improve the connection strength between the connecting shaft 110 and the first hub 301, further reducing radial runout of the first fan 300.

[0219] In some embodiments, first boss 130 is cylindrical, with the axis of first boss 130 collinear with the axis of first hub 301. The end of connecting shaft 110 facing first hub 301 is integrally formed with first boss 130 and first hub 301, further enhancing the strength of the connection between connecting shaft 110 and the new fan.

[0220] In some embodiments, the diameter of the first boss 130 is at least three times the diameter of the connecting shaft 110. The first boss 130 is large enough to ensure sufficient connection strength between the connecting shaft 110 and the first hub 301.

[0221] In some embodiments, the outer peripheral wall of the first boss 130 is provided with first reinforcing ribs 150. Multiple first reinforcing ribs 150 are spaced apart around the axis of the first boss 130 and are connected to the first hub 301. The first reinforcing ribs 150 are configured to strengthen the connection between the first boss 130 and the first hub 301. When the connecting shaft 110 is transmitted through the first boss 130 to the first hub 301, the first reinforcing ribs 150 reduce deformation between the first boss 130 and the first hub 301, thereby reducing vibration and noise of the first fan 300.

[0222] In some embodiments, the first reinforcing rib 150 is integrally formed with the first boss 130 , the first hub 301 and the connecting shaft 110 to further improve the strength of the structure.

[0223] In some embodiments, a second boss 140 is provided on the side of the first hub 301 away from the first boss 130. The second boss 140 is coaxial with the first boss 130. The second boss 140 further enhances the connection strength between the connecting shaft 110 and the first hub 301. Furthermore, the second boss 140 strengthens the structural strength of the side of the first hub 301 away from the second fan 400, thereby preventing damage to the first hub 301.

[0224] In some embodiments, a second reinforcing rib 155 is provided on the outer peripheral wall of the second boss 140 , and a plurality of second reinforcing ribs 155 are provided in the axial direction of the second boss 140 .

[0225] In some embodiments, the second boss 140 , the second reinforcement rib 155 , the first hub 301 , the first boss 130 , the first reinforcement rib 150 , and the connecting shaft 110 are integrally formed to improve the overall structural strength.

[0226] In some embodiments, the end of the first boss 130 away from the first hub 301 does not exceed the end of the first blade 302 away from the first hub 301. This prevents friction between the first boss 130 and the volute 700, thereby preventing noise.

[0227] In some embodiments, the axial length of the first boss 130 is at least six times the axial length of the second boss 140 .

[0228] In some embodiments, the connecting shaft 110 is directly connected to the second fan 400 in one piece.

[0229] In some embodiments, an end cap 160 is integrally formed at one end of the connecting shaft 110 away from the first fan 300 , and the end cap 160 is connected to the second fan 400 , thereby achieving the connection between the second fan 400 and the connecting shaft 110 .

[0230] In some embodiments, the end cover 160 is integrally connected to the second fan 400 , thereby achieving integral injection molding of the connecting shaft 110 , the end cover 160 , and the second fan 400 , thereby improving the connection strength between the second fan 400 and the connecting shaft 110 .

[0231] In some embodiments, second fan 400 includes a second hub 401 and a plurality of second blades 402. The plurality of second blades 402 are spaced apart along the edge of second hub 401. Second hub 401 is integrally formed with connecting shaft 110. The integral formation of second hub 401 and connecting shaft 110 ensures a connection between connecting shaft 110 and second fan 400, improving structural strength.

[0232] In some embodiments, a bearing is disposed within the housing 100 and is located between the volute 700 and the second fan 400. The bearing comprises an inner ring and an outer ring. The outer ring is secured within the housing 100, while the inner ring is coaxially sleeved on the connecting shaft 110. During production, the first fan 300 and the connecting shaft 110 are first integrally formed, the bearing is sleeved on the connecting shaft 110, and then the connecting shaft 110 and the second fan 400 are integrally formed.

[0233] In some embodiments, the volute 700 includes a first split housing and a second split housing, with a first air supply cavity formed between the first and second split housings. A first fan 300 is disposed within the first air supply cavity, and a first air outlet 720 is connected to the first air supply cavity. When the first motor 500 drives the first fan 300 to rotate, the first fan 300 outputs outdoor fresh air into the room through the first air outlet 720.

[0234] In some embodiments, the first split housing is disposed on a side of the second split housing close to the first motor 500. The first split housing is provided with an axial hole configured to allow the output shaft of the first motor 500 to pass through.

[0235] In some embodiments, a gap is set between the shaft hole and the output shaft of the first motor 500 .

[0236] In some embodiments, a bearing is disposed within the shaft hole. The bearing comprises an outer ring and an inner ring coaxially disposed within the outer ring. The inner ring is rotatably connected to the outer ring and coaxially sleeved around the output shaft of the first motor 500. The outer ring is coaxially secured within the shaft hole. The bearing ensures that the shaft hole is coaxial with the output shaft of the first motor 500. This prevents vibrations from the first fan 300, which could collide with the volute 700 and generate noise, when the first motor 500 drives the first fan 300.

[0237] In some embodiments, the first split shell and the second split shell are spliced ​​to each other. The connection method between the first split shell and the second split shell also includes but is not limited to: clamping, screw connection, bonding, welding, riveting, etc.

[0238] In some embodiments, the second split housing includes a first half-shell and a second half-shell. The second half-shell is positioned between the first half-shell and the first split housing to form a second air supply cavity, which is in communication with the first air supply cavity. The first air inlet is in communication with the second air supply cavity. When the first motor 500 drives the first fan 300 to rotate, outdoor fresh air enters the second air supply cavity through the first air inlet and then the first air supply cavity. Under the action of the first fan 300, fresh air is discharged into the room through the first air outlet 720.

[0239] In some embodiments, the first half shell and the second half shell are spliced ​​to each other. The connection between the first half shell and the second half shell also includes but is not limited to: clamping, screw connection, bonding, welding, riveting, etc.

[0240] In some embodiments, the first air supply cavity is formed between the first split shell and the second half shell.

[0241] In some embodiments, a ventilation duct is defined in the second half shell to connect the first and second air supply chambers. A filter is positioned within the second air supply chamber, located between the first air inlet and the ventilation duct. When the motor drives the first fan 300, fresh outdoor air enters the second air supply chamber through the first air inlet. After passing through the filter, the air enters the first air supply chamber through the ventilation duct and is then output to the interior of the room through the first air outlet 720.

[0242] In some embodiments, the first split shell, the second half shell, and the first half shell are distributed along the axial direction of the second fan 400 .

[0243] In some embodiments, the opening direction of the ventilation channel is the same as the axial direction of the first fan 300, and the ventilation channel passes through the second half shell to achieve communication between the first air supply cavity and the second air supply cavity.

[0244] In some embodiments, the filter screen includes a frame and a filter screen sheet, wherein the filter screen sheet is disposed within the frame and is detachably connected to the frame. When the filter screen needs to be replaced, the filter screen sheet can be replaced separately, thereby saving costs.

[0245] In some embodiments, the side of the filter facing away from the second half-shell is the windward side, and the axis of the first fan 300 is perpendicular to the windward side of the filter. The filter housing is provided with a ventilation channel, and the fresh air in the second air supply chamber must pass through the filter before entering the first air supply chamber through the ventilation channel, ensuring that the outdoor fresh air is filtered and purified by the filter.

[0246] In some embodiments, the volute 700 is provided with a plug-in channel connected to the second air supply chamber, and the plug-in channel is configured to insert the filter into the second air supply chamber. The plug-in channel enables the filter to be inserted and removed from the second air supply chamber, facilitating maintenance and replacement of the filter.

[0247] In some embodiments, the plug channel is opened on the first half shell and / or the second half shell.

[0248] In some embodiments, the plug-in channel is opened on a side of the volute 700 facing the front panel of the housing 100 , or the plug-in channel is opened on a side of the volute 700 facing the bottom of the housing 100 .

[0249] In some embodiments, a fresh air duct is provided on the housing 100 , and the fresh air duct is connected to the first air inlet, so that outdoor fresh air enters the second air supply cavity in the housing 100 through the fresh air duct.

[0250] In some embodiments, a first fresh air damper is disposed within the volute 700 and is configured to open or close the first air inlet. When the fresh air mode is on, the first fresh air damper opens the first air inlet; when the fresh air mode is off, the first fresh air damper closes the first air inlet, preventing the input of fresh air.

[0251] In some embodiments, a first driving member is disposed in the volute 700 and is configured to drive the first fresh air baffle to move so as to open or close the first air inlet. The first driving member includes but is not limited to an electric motor, a motor, a gas rod, or a hydraulic rod.

[0252] In some embodiments, a second fresh air baffle is provided on the volute 700, and the second fresh air baffle is configured to open or close the first air outlet 720. When the fresh air mode is turned on, the first fresh air baffle opens the first air inlet, and the second fresh air baffle opens the first air outlet 720. When the fresh air mode is turned off, the first fresh air baffle closes the first air inlet, and the second fresh air baffle closes the first air outlet 720. Because the first fan 300 and the second fan 400 are driven to rotate simultaneously by a first motor 500, the first fan 300 will still rotate in the volute 700 when the fresh air mode is turned off. By closing the first air outlet 720 by the second fresh air baffle, the volute 700 becomes a closed space, reducing the noise generated by the airflow.

[0253] In some embodiments, the volute 700 is provided with a second driving member, which is configured to drive the second fresh air baffle to move so as to open or close the first air outlet 720. The second driving member includes but is not limited to a motor, a pneumatic rod, or a hydraulic rod.

[0254] In some embodiments, a wind deflector is provided at the second air outlet 102, and the wind deflector is configured to close the second air outlet 102. When the wall-mounted air conditioner is not in use, the wind deflector closes the second air outlet 102 to prevent dust from entering the housing 100 and improve the aesthetics and integrity.

[0255] In some embodiments, a third driving member is provided on the housing 100 , and the third driving member is configured to drive the air guide plate to flip, so that the air guide plate opens or closes the second air outlet 102 .

[0256] In some embodiments, the flip angle of the air guide plate is adjusted by a third driving member to guide the airflow output through the second air outlet 102 .

[0257] The present disclosure also provides a wall-mounted air conditioner, comprising: a housing 100, an indoor heat exchanger, a second fan 400, a volute 700, a first fan 300, a connecting shaft 110, an end cover 160, and a first motor 500. The housing 100 has a first inner cavity and a second inner cavity defined along its length. A second air inlet 101 is defined at the top of the housing 100, and a second air outlet 102 is defined at the front bottom of the housing 100.

[0258] The indoor heat exchanger is disposed within the first inner cavity, exchanging heat with the air passing through it to form a heat exchange airflow. A second fan 400 is disposed within the first inner cavity, positioned below the indoor heat exchanger. The indoor airflow, driven by the second fan 400, enters the housing 100 through the second air inlet 101, exchanges heat in the indoor heat exchanger, and is then output to the indoor room through the second air outlet 102.

[0259] The volute 700 is disposed in the second inner cavity, and is provided with a first air inlet and a first air outlet 720. The first fan 300 is disposed in the volute 700.

[0260] The first motor 500 is disposed on the side of the second fan 400 away from the first fan 300. The first motor 500 drives the second fan 400 to rotate. The end cover 160 is disposed on the side of the second fan 400 facing the first fan 300. The ends of the connecting shaft 110 are coaxially connected to the first fan 300 and the end cover 160, respectively. The connecting shaft 110 is integrally formed with the first fan 300 and the end cover 160. When the first motor 500 drives the second fan 400 to rotate, the second fan 400 drives the first fan 300 to rotate synchronously via the connecting shaft 110.

[0261] Through the above solution, the connecting shaft 110 is integrally formed with the first fan 300 and the end cap 160, which is then connected to the second fan 400. This effectively connects the connecting shaft 110 to the second fan 400, improving the connection strength between the first and second fans 300 and 400. When the first motor 500 drives the second fan 400, the second fan 400 drives the first fan 300 to rotate more stably, reducing radial runout of the first fan 300 and reducing noise.

[0262] In some embodiments, the end cover 160 and the second fan 400 are integrally formed, thereby further improving the connection strength between the connecting shaft 110 and the second fan 400.

[0263] As shown in Figures 16 to 26 , one embodiment of the wall-mounted air conditioner disclosed herein includes a housing 100, an indoor heat exchanger, a second fan 400, a volute 700, a first fan 300, and a first motor 500. The housing 100 is provided with a first inner cavity and a second inner cavity along its length. A second air inlet is provided at the top of the housing 100, and a second air outlet is provided at the front bottom of the housing 100. The indoor heat exchanger is disposed within the first inner cavity and exchanges heat with air passing through the indoor heat exchanger to form a heat exchange airflow.

[0264] The second fan 400 is disposed within the first inner cavity and below the indoor heat exchanger. The indoor airflow, driven by the second fan 400, enters the housing 100 through the second air inlet, exchanges heat in the indoor heat exchanger, and is then output to the indoor space through the second air outlet. The volute 700 is disposed within the second inner cavity and is provided with a first air inlet and a first air outlet. The first fan 300 is disposed within the volute 700. The first motor 500 drives the second fan 400 and the first fan 300 to rotate synchronously.

[0265] The distance between the end of the first fan 300 facing the second fan 400 and the inner wall of the volute 700 is L1 , and the axial thickness of the first fan 300 is L2 , where L1 = L2 / 5.

[0266] Through the above solution, by controlling the gap between the first fan 300 and the volute 700, the first fan 300 is prevented from touching the volute 700 while ensuring the fresh air volume, thereby avoiding noise.

[0267] In some embodiments, the length of L1 is 7 to 9 mm. By controlling the gap between the first fan 300 and the volute 700, the first fan 300 is prevented from touching the volute 700 while ensuring the fresh air volume, thereby preventing noise.

[0268] In some embodiments, the distance of L1 is 8 mm. After testing, when the distance of L1 is 8 mm, when the first fan 300 is 730 rpm, the air volume is 12.34 cubic meters per hour, and the noise is 22.49 decibels. When the first fan 300 is 860 rpm, the air volume is 15.32 cubic meters per hour, and the noise is 24.4 decibels. When the first fan 300 is 980 rpm, the air volume is 18.09 cubic meters per hour, and the noise is 27.5 decibels. When the first fan 300 is 1350 rpm, the air volume is 27.8 cubic meters per hour, and the noise is 34.25 decibels. When the distance of L1 is less than 7 mm and greater than 9 mm, the noise value becomes larger.

[0269] In some embodiments, the length of L2 is 35 to 45 mm. By controlling the gap between the first fan 300 and the volute 700, the first fan 300 is prevented from contacting the volute 700, thereby preventing noise while ensuring sufficient fresh air volume. Based on the assumption that L1 = L2 / 5, when L2 is 35 mm, L1 is 7 mm. When L2 is 45 mm, L1 is 9 mm, meeting the dimensional requirements for L1.

[0270] Referring to Figures 30 and 31 , in some embodiments, the volute 700 includes a first split housing 730 and a second split housing 740. The first split housing 730 is disposed on the side of the second split housing 740 that is closest to the second fan 400. The length L1 is the distance from the side of the first split housing 730 facing the second split housing 740 to the end of the first fan 300 facing the second fan 400. This ensures that the distance between the first fan 300 and the inner sidewall of the volute 700 closest to it is within an appropriate range, ensuring sufficient fresh air flow while preventing the first fan 300 from contacting the volute 700 and thereby preventing noise.

[0271] In some embodiments, the first motor 500 has a single output shaft, with both ends of the output shaft coaxially connected to the first fan 300 and the second fan 400. When the first motor 500 rotates, the output shaft drives the second fan 400 and the first fan 300 to rotate simultaneously.

[0272] In some embodiments, the first motor 500 has two output shafts, namely a first output shaft and a second output shaft. The first output shaft is coaxially connected to the second fan 400, and the second output shaft is coaxially connected to the first fan 300. When the first motor 500 is running, the first output shaft and the second output shaft rotate synchronously.

[0273] In some embodiments, the output shaft of the first motor 500 is connected to the first fan 300. The first fan 300 is provided with a transmission assembly, which is connected to the second fan 400. The first motor 500 drives the first fan 300 to rotate, and the first fan 300 drives the second fan 400 to rotate synchronously via the transmission assembly, thereby achieving a single first motor 500 driving the first fan 300 and the second fan 400 to rotate synchronously.

[0274] In some embodiments, the output shaft of the first motor 500 is connected to the second fan 400. The second fan 400 is provided with a transmission assembly, which is connected to the first fan 300. The first motor 500 drives the second fan 400 to rotate, and the second fan 400 drives the first fan 300 to rotate synchronously via the transmission assembly, thereby achieving a single first motor 500 driving the first fan 300 and the second fan 400 to rotate synchronously.

[0275] In some embodiments, the output shaft of the first motor 500 is connected to the second fan 400 . The second fan 400 is provided with a connecting shaft at one end facing the first fan 300 . The connecting shaft passes through the volute 700 and is connected to the first fan 300 .

[0276] Referring to Figures 30 and 31 , in some embodiments, the second split housing 740 includes a first half housing 741 and a second half housing 742. The second half housing 742 is disposed on the end of the first half housing 741 facing the second fan 400. The first split housing 730 is disposed on a side of the second half housing 742 away from the first half housing 741. The first fan 300 is disposed between the first split housing 730 and the second half housing 742. The volute 700 is composed of the first half housing 741, the second half housing 742, and the first split housing 730. Its rational structure ensures a high fresh air volume.

[0277] 30 and 31 , in some embodiments, the second split shell 740 further includes a third half shell 743 , which is disposed on a side of the second half shell 742 away from the first half shell 741 , and the first split shell 730 is configured to be connected to the second half shell 742 and the third half shell 743 . First, connect the first half shell 741, the second half shell 742 and the third half shell 743. When installing the first split shell 730, the first split shell 730 is connected to the third half shell 743 and the second half shell 742 to realize the installation of the first split shell 730 and the second split shell 740. When producing the air conditioner, connect the first half shell 741 and the second half shell 742, connect the third half shell 743 and the second half shell 742, and then place the first fan 300 between the third half shell 743 and the second half shell 742, and then use the first split shell 730 to close the opening of the third half shell 743 and the second half shell 742 to complete the installation of the volute 700, which is convenient for manual operation.

[0278] In some embodiments, the length of L1 is the distance from the inner wall of the third half shell 743 facing away from the second fan 400 to the end of the first fan 300 facing the second fan 400 .

[0279] In some embodiments, after the volute 700 is installed, the inner wall of the third half shell 743 and the inner wall of the first split shell 730 are in the same plane. The axis of the first fan 300 is perpendicular to the inner wall of the third half shell 743 or the first split shell 730.

[0280] 26 to 29 , in some embodiments, the first fan 300 includes a first hub 301 and a plurality of first blades 302 . The first blades 302 are disposed on a side of the first hub 301 facing the second fan 400 . When the first motor 500 drives the first fan 300 to rotate, air is blown through the plurality of first blades 302 .

[0281] In some embodiments, the length of L1 is the distance from the side of the first split housing 730 facing the second split housing 740 to the end of the first blade 302 facing the second fan 400 .

[0282] In some embodiments, the first hub 301 is generally disc-shaped and hollowed out to facilitate air circulation. Multiple first blades 302 are spaced apart along the edge of the first hub 301, with the spacing between any two adjacent first blades 302 being uniform. The length of the first blades 302 is aligned with the axial direction of the first hub 301. The axial thickness L2 of the first fan 300 is the distance from the end of the first blade 302 facing the second fan 400 on the side of the first hub 301 away from the second fan 400.

[0283] 26 to 29 , in some embodiments, the first fan 300 includes a first hub 301 and a plurality of third blades 303 . The third blades 303 are disposed on a side of the first hub 301 facing away from the second fan 400 . When the first motor 500 drives the first fan 300 to rotate, the third blades 303 generate air.

[0284] In some embodiments, the length of L1 is the distance between the side of the first hub 301 facing away from the third blades 303 and the inner wall of the volute 700 facing away from the second fan 400. This ensures that the distance between the first fan 300 and the inner wall of the volute 700 closest to it is within an appropriate range, ensuring a sufficient amount of fresh air while preventing the first fan 300 from contacting the volute 700 and generating noise.

[0285] Referring to Figures 26 to 29 , in some embodiments, the first fan 300 includes first blades 302, a first hub 301, and third blades 303. The first blades 302 are located on the side of the first hub 301 facing the second fan 400, and the third blades 303 are located on the side of the first hub 301 away from the second fan 400. The length L2 is the distance from the end of the third blade 303 away from the second fan 400 to the end of the first blade 302 facing the second fan 400.

[0286] In some embodiments, the distance L2 is the distance from the farthest point of the first fan 300 away from the second fan 400 to the closest point of the first fan 300 toward the second fan 400 along the axis.

[0287] In some embodiments, a first flange and a positioning member are provided on the second split shell 740. The first flange guides the first split shell 730. The first split shell 730 is provided with a positioning portion configured to cooperate with the positioning member.

[0288] With the above solution, the first flange guides the first split housing 730 to facilitate connection between the first split housing 730 and the second split housing 740. The positioning member and the positioning portion cooperate to ensure the relative position of the first split housing 730 and the second split housing 740, thereby ensuring a stable connection between the first split housing 730 and the second split housing 740. This improves the airtightness between the second split housing 740 and the first split housing 730, reducing air leakage. This also facilitates manual assembly and improves assembly efficiency.

[0289] In some embodiments, the second fan 400 includes a second hub and a plurality of second blades. The plurality of second blades are spaced apart along the edge of the second hub. The spacing between any two adjacent second blades is the same. The ends of the connecting shaft are respectively connected to the second hub and the first hub 301, thereby connecting the second fan 400 to the first fan 300, and enabling the first motor 500 to drive the second fan 400 and the first fan 300 to rotate synchronously.

[0290] The present disclosure also provides a wall-mounted air conditioner, comprising: a housing 100, an indoor heat exchanger, a second fan 400, a volute 700, a first fan 300, and a first motor 500. The housing 100 has a first inner cavity and a second inner cavity defined along its length. A second air inlet is defined at the top of the housing 100, and a second air outlet is defined at the bottom front of the housing 100. The indoor heat exchanger is disposed within the first inner cavity and exchanges heat with air passing through the indoor heat exchanger to form a heat exchange airflow.

[0291] The second fan 400 is disposed in the first inner cavity and below the indoor heat exchanger. The indoor airflow enters the housing 100 through the second air inlet under the action of the second fan 400, and is output to the room through the second air outlet after being heated by the indoor heat exchanger.

[0292] The volute 700 is disposed in the second inner cavity and is provided with a first air inlet and a first air outlet. The first fan 300 is disposed in the volute 700. The first motor 500 drives the second fan 400 and the first fan 300 to rotate synchronously.

[0293] The distance between the end of the first fan 300 facing the second fan 400 and the inner wall of the volute 700 is L1 , and the thickness of the volute 700 along the axial direction of the first fan 300 is L3 , where L1 = L3 / 6.

[0294] Through the above solution, by controlling the gap between the first fan 300 and the volute 700, the first fan 300 is prevented from touching the volute 700 while ensuring the fresh air volume, thereby avoiding noise.

[0295] In some embodiments, the length of L1 is 7 to 9 mm. By controlling the gap between the first fan 300 and the volute 700, the first fan 300 is prevented from touching the volute 700 while ensuring the fresh air volume, thereby preventing noise.

[0296] In some embodiments, the length of L3 is the distance from the inner sidewall of the first split shell 730 close to the second fan 400 to the inner sidewall of the first half shell 741 away from the second fan 400 .

[0297] In some embodiments, the volute 700 has a first air supply cavity formed by the second half shell 742 , the third half shell 743 and the first split shell 730 , and the first fan 300 is disposed in the first air supply cavity.

[0298] In some embodiments, the length of L3 is the width of the first air supply cavity along the axial direction of the first fan 300 .

[0299] In some embodiments, the volute 700 has a second air supply chamber, and a ventilation channel is opened on the second half shell 742 to realize the connection between the first air supply chamber and the second air supply chamber. The first air inlet is connected to the second air supply chamber, and the outdoor air enters the second air supply chamber through the first air inlet. The fresh air enters the first air supply chamber through the ventilation channel and is then output to the room.

[0300] Figures 32 to 57 are a specific implementation of the air-conditioning indoor unit disclosed in the present invention. In this embodiment, the air-conditioning indoor unit includes a casing 1, a heat exchanger, a fresh air module, an induced draft fan 4, a first motor 5, a reinforcement shaft 1000, a connecting shaft 900 and a bearing 7.

[0301] In the aforementioned air conditioning indoor unit, as shown in FIG32 , the casing 1 is configured to form the overall appearance of the air conditioning indoor unit. The casing 1 has a top and a bottom. The top and bottom of the casing 1 are opposite ends, and the height of the casing 1 is defined by the distance from the top to the bottom. The left side of the casing 1 and the right side of the casing 1 are opposite ends, and the width of the casing 1 is defined by the distance from the left to the right. The front side of the casing 1 and the rear side of the casing 1 are opposite ends, and the thickness of the casing 1 is defined by the distance from the front to the rear. In this embodiment, the rear side of the casing 1 is positioned toward a wall. The casing 1 is provided with a second air inlet 11 and a second air outlet 15, each of which is connected to the interior of the casing 1. The second air inlet 11 is located at the top of the casing 1 and is provided with a second grille to prevent debris from entering the interior of the casing 1. The second air outlet 15 is located at the lower front side of the housing 1. An air guide plate 2 is provided at the second air outlet 15. The air guide plate 2 is connected to the housing 1 in an openable and closable manner to open or close the second air outlet 15. It should be noted that the housing 1 also has an air supply port 12, through which outdoor fresh air flows into the room.

[0302] In some embodiments, the air supply port 12 is located on the left side of the second air inlet 11 and is opened upward so that outdoor fresh air flows into the room in an upward direction.

[0303] In some embodiments, as shown in Figures 34, 36, and 38, a first mounting cavity 14, a second mounting cavity 13, and a third mounting cavity 16 are provided within the housing 1. The second mounting cavity 13, the first mounting cavity 14, and the third mounting cavity 16 are sequentially arranged along the length of the housing 1. The first mounting cavity 14 is configured to accommodate the induced draft fan 4. The second mounting cavity 13 is configured to accommodate the first motor 5. The third mounting cavity 16 is configured to accommodate the fresh air module.

[0304] In other embodiments, the third mounting cavity 16 is located to the left of the first mounting cavity 14, and the second mounting cavity 13 is located to the right of the first mounting cavity 14. The second mounting cavity 13 and the first mounting cavity 14 are separated from each other by a first housing connection portion 17, and the first mounting cavity 14 and the third mounting cavity 16 are separated from each other by a second housing connection portion 18.

[0305] In the aforementioned air conditioner indoor unit, the heat exchanger is installed within the housing 1 and is configured to exchange heat with the indoor air within the housing 1 to generate conditioned air, thereby meeting the user's cooling or heating needs. It should be noted that the conditioned air can be cold air, hot air, or even room temperature air. It should also be noted that the heat exchanger is located near the second air inlet 11.

[0306] In the above-mentioned air conditioning indoor unit, as shown in Figures 33, 34 and 40, the fresh air module is configured to introduce outdoor fresh air into the room. The fresh air module includes a volute 3 and a first fan 8. The volute 3 is installed in the third installation cavity 16. An air supply cavity 321 and a purification chamber 331 are provided in the volute 3. The purification chamber 331 is connected to the air supply cavity 321. The first fan 8 is installed in the air supply cavity 321. A purification module 34 is installed in the purification chamber 331 and is configured to purify the outdoor air. The purification chamber 331 is provided with a first air inlet 37, and the air supply cavity 321 is provided with a first air outlet 35. The first air inlet 37 is connected to the outside through a pipeline, and the first air outlet 35 is connected to the air supply 12. The first fan 8 is operated to introduce outdoor fresh air into the air supply chamber 321 through the pipeline from the first air inlet 37, enters the air supply chamber 321 after being purified by the purification module 34, and flows into the room through the first air outlet 35 and the air supply port 12.

[0307] In some embodiments, as shown in FIG41 , the volute 3 includes a mounting shell 33, a second shell 32, and a first shell 31. The mounting shell 33 and the second shell 32 are disposed opposite each other to form a purification chamber 331. The second shell 32 is disposed opposite the first shell 31 on a side facing away from the mounting shell 33 to form an air supply chamber 321. The second shell 32 is provided with a first grille 322 located at the junction of the purification chamber 331 and the air supply chamber 321 to connect the purification chamber 331 with the air supply chamber 321, thereby allowing air in the purification chamber 331, which has been purified by the purification module 34, to enter the air supply chamber 321.

[0308] In some embodiments, the purification module 34 includes a purification frame and a filter. The filter is mounted on the purification frame and is configured to filter and purify outdoor fresh air, preventing impurities and flocculent matter from entering the room. It should be noted that the purification frame is slidably connected to the purification chamber 331 to enable the sliding removal and installation of the purification module 34, thereby facilitating user removal, cleaning, and replacement of the filter.

[0309] In some embodiments, as shown in Figures 42 and 43 , the first fan 8 includes a hub 82 and a plurality of blades 81. The blades 81 are spaced apart along the circumference of the hub 82 and are fixedly connected to the hub 82. A shaft hole 831 is defined in the center of the hub 82, corresponding to the pre-set hole 311. A connecting shaft 900 is disposed within the shaft hole 831 to connect the connecting shaft 900 to the hub 82.

[0310] In other embodiments, the hub 82 is provided with a connecting post 83, which is located at the center of the hub 82, and the end of the connecting post 83 away from the hub 82 extends away from the induced draft fan 4. The shaft hole 831 is defined in the connecting post 83 and is provided through the connecting post 83 along the extension direction of the connecting post 83.

[0311] In the above-mentioned air-conditioning indoor unit, as shown in Figures 44, 45 and 47, the induced draft fan 4 is configured to introduce indoor fresh air into the interior of the casing 1, and to flow the conditioned air inside the casing 1 into the interior through the second air outlet 15. The induced draft fan 4 is installed in the first installation cavity 14 and is located on the side of the heat exchanger away from the second air inlet 11. The induced draft fan 4 is connected to a first motor 5, which is installed in the second installation cavity 13 to drive the induced draft fan 4 to operate. It should be noted that the end of the induced draft fan 4 away from the first motor 5 is connected to the first fan 8, so that the first motor 5 can drive the induced draft fan 4 and the first fan 8 to operate simultaneously.

[0312] In some embodiments, as shown in FIG45 , induced draft fan 4 is provided with a motor connection portion 41 located at the end of induced draft fan 4 that connects to first motor 5. A motor mounting cavity is defined within motor connection portion 41. The motor mounting cavity extends axially along induced draft fan 4 and opens toward first motor 5. The rotating shaft of first motor 5 is disposed within the motor mounting cavity, thereby connecting first motor 5 to induced draft fan 4.

[0313] In other embodiments, as shown in FIG47 , the motor connection portion 41 is provided with a connection hole that communicates with the motor mounting cavity, with the opening of the connection hole intersecting the extension direction of the motor mounting cavity. A connector 202 is provided in the connection hole, which extends into the motor mounting cavity and abuts against the rotating shaft of the first motor 5 to securely connect the first motor 5 to the induced draft fan 4.

[0314] In other embodiments, the rotating shaft of the first motor 5 is provided with a limiting portion 51, which is located on the outer periphery of the rotating shaft of the first motor 5. The limiting portion 51 abuts against the opening of the motor mounting cavity to locate the connection position between the rotating shaft of the first motor 5 and the motor mounting cavity.

[0315] In the above-mentioned air-conditioning indoor unit, the reinforcing shaft 1000 is configured to prevent the induced draft fan 4 from axially deforming. The reinforcing shaft 1000 is arranged inside the induced draft fan 4 and extends axially along the induced draft fan 4 to reduce the deformation of the induced draft fan 4 caused by cooling or heating. One end of the reinforcing shaft 1000 is connected to the connecting shaft 900, and the other end of the reinforcing shaft 1000 is connected to the motor connecting portion 41 to reduce the deformation of the induced draft fan 4 caused by cooling or heating. It should be noted that, in some embodiments, the reinforcing shaft 1000 is fixedly connected to the end of the connecting shaft 900 away from the first fan 8, and the reinforcing shaft 1000 is welded or integrally formed with the induced draft fan 4 and the motor connecting portion 41.

[0316] In the above-described air conditioning indoor unit, as shown in Figures 45 to 49 , a connecting shaft 900 is configured to connect the induced draft fan 4 and the first fan 8. One end of the connecting shaft 900 is connected to the induced draft fan 4, and the other end of the connecting shaft 900 is connected to the first fan 8, so that the induced draft fan 4 and the first fan 8 operate simultaneously. It should be noted that to facilitate the connection of the connecting shaft 900 to the first fan 8 disposed in the air supply chamber 321, the first housing 31 is provided with a reserved hole 311. The opening of the reserved hole 311 is disposed toward the induced draft fan 4, so that the connecting shaft 900 can pass through the reserved hole 311 to connect to the first fan 8.

[0317] In some embodiments, as shown in Figures 45 to 49 , connecting shaft 900 is configured to connect induced draft fan 4 and first fan 8. Connecting shaft 900 is provided with a fifth mounting space 93, which is arranged circumferentially along connecting shaft 900 and located at the end of first fan 8 facing induced draft fan 4. A clamping ring 200 is connected to fifth mounting space 93, which abuts against first fan 8 to constrain the axial connection position between first fan 8 and connecting shaft 900. It should be noted that an accommodating cavity 821 is provided at the end of first fan 8 facing induced draft fan 4. Accommodating cavity 821 is communicated with shaft hole 831, and clamping ring 200 is located within accommodating cavity 821.

[0318] In some embodiments, as shown in FIG49 , a restraining portion 91 is provided at one end of the connecting shaft 900 connected to the first fan 8, with at least a portion of the restraining portion 91 extending through the shaft hole 831. It should be noted that the shaft hole 831 is a through hole extending axially through the first fan 8 along the induced draft fan 4. A fastener 201 is connected to the restraining portion 91, which abuts against the opening of the shaft hole 831 away from the induced draft fan 4 to constrain the axial connection between the first fan 8 and the connecting shaft 900. It should also be noted that the restraining portion 91 is provided with external threads, and the fastener 201 is a nut.

[0319] In some embodiments, a first positioning portion 92 is provided at the connection between the connecting shaft 900 and the first fan 8. The first positioning portion 92 is located on the outer periphery of the connecting shaft 900. The first fan 8 is provided with a second positioning portion 822. The second positioning portion 822 is located in the shaft hole 831. The second positioning portion 822 cooperates with the first positioning portion 92 to locate the circumferential connection position of the first fan 8 and the connecting shaft 900. It should be noted that the first positioning portion 92 is a plane provided on the outer periphery of the connecting shaft 900, and the second positioning portion 822 is a plane provided on the inner wall of the shaft hole 831. By designing the first positioning portion 92 and the second positioning portion 822 as planes, on the one hand, the mutual cooperation between the two is facilitated, and on the other hand, the connecting shaft 900 and the inner wall of the shaft hole 831 can rotate relative to each other.

[0320] Because the first motor 5 simultaneously drives the induced draft fan 4 and the first fan 8, the first fan 8 cannot be stopped independently. Consequently, the fresh air function cannot be turned off while the air conditioner is operating. Therefore, as shown in Figure 50, the air conditioner is equipped with a switch assembly 36 at the first air inlet 37. The switch assembly 36 is used to open or close the first air inlet 37 to control whether outdoor fresh air is introduced into the purification chamber 331, thereby controlling the on / off of the fresh air function. When the air conditioner is operating, if the fresh air function needs to be turned off, closing the first air inlet 37 prevents outdoor fresh air from being introduced into the purification chamber 331, thereby preventing outdoor fresh air from flowing into the room through the first air outlet 35. When the fresh air function needs to be turned on, opening the first air inlet 37 allows outdoor fresh air to be introduced into the purification chamber 331 through the first air inlet 37, thereby allowing outdoor fresh air to flow into the room through the first air outlet 35.

[0321] Specifically, as shown in FIG50 , the switch assembly 36 includes a baffle 361, a second motor 363, a gear, and a rack 362. The baffle 361 is disposed at the first air outlet 35 in an openable and closable manner. The second motor 363 is mounted on the mounting housing 33. A gear is connected to the rotating shaft of the second motor 363. The baffle 361 is provided with a rack 362, which meshes with the gear. When the fresh air function is on, the second motor 363 drives the gear to drive the rack 362 to move, thereby driving the baffle 361 to move linearly, thereby opening the first air inlet 37 and allowing outdoor fresh air to enter the room. When the fresh air function is off, the second motor 363 drives the gear to drive the rack 362 to move, and the baffle 361 moves linearly, thereby closing the first air inlet 37 and preventing outdoor fresh air from entering the room. It should be noted that closing the first air inlet 37 by the baffle 361 can also prevent fresh air from flowing back into the room when the air-conditioning indoor unit is turned off, thereby reducing the indoor fresh air noise and wind feeling when the fresh air function is not turned on, and improving the user experience.

[0322] In the aforementioned air conditioner indoor unit, as shown in Figures 55 and 56 , a bearing 7 is sleeved around the outer circumference of the connecting shaft 900 and is configured to support the connecting shaft 900 for rotation. As shown in Figures 51 and 52 , the bearing 7 comprises a bearing sleeve 71 and a bearing ball 72. The bearing 7 is provided with a bearing cavity 714 extending through the bearing sleeve 71 and the bearing ball 72. The two ends of the bearing cavity 714 are opened toward the first fan 8 and the induced draft fan 4, respectively. The connecting shaft 900 is disposed through the bearing cavity 714. It should be noted that a fourth mounting space 715 is provided within the bearing sleeve 71. The fourth mounting space 715 communicates with the bearing cavity 714 and is disposed near the induced draft fan 4. The bearing ball 72 is disposed within the fourth mounting space 715. Furthermore, a reinforcement portion 716 is provided on the end of the bearing sleeve 71 facing the first housing 31. The bearing cavity 714 extends through the reinforcement portion 716 to increase the contact area between the connecting shaft 900 and the bearing sleeve 71.

[0323] In the above-mentioned air conditioning indoor unit, as shown in Figures 55 and 56 , a bearing housing 6 is disposed outside the bearing 7 and connected to the housing 1 to facilitate the installation of the bearing 7, allowing the bearing 7 to better support the connecting shaft 900. A second through-cavity 64 is provided within the bearing housing 6. The second through-cavity 64 is configured to accommodate the bearing 7. The bearing 7 is disposed within the second through-cavity 64, and the outer periphery of the bearing 7 closely fits the inner wall of the second through-cavity 64, thereby securely connecting the bearing 7 to the bearing housing 6. The second through-cavity 64 extends along the length of the housing 1. The openings at both ends of the second through-cavity 64 are disposed toward the first housing 31 and the induced draft fan 4, respectively, so that the connecting shaft 900 can extend into the second through-cavity 64 to connect with the bearing 7 and pass through the second through-cavity 64 to connect with the induced draft fan 4. It should be noted that a connecting platform 67 is provided within the second through-cavity 64 and is disposed circumferentially therewith. The bearing sleeve 71 is provided with a positioning block 711, which is located on the outer periphery of the bearing sleeve 71 and arranged circumferentially along the bearing sleeve 71. The positioning block 711 abuts the connecting platform 67, so that the bearing sleeve 71 is pressed and assembled with the inner wall of the second through-cavity 64, thereby fixedly connecting the bearing 7 to the bearing housing 6. It should also be noted that the connecting platform 67 is connected to the inner wall of the second through-cavity 64, and the inner diameter of the connecting platform 67 gradually decreases along the axial direction of the second through-cavity 64 as it approaches the induced draft fan 4. This ensures that the closer the bearing sleeve 71 is to the induced draft fan 4, the greater the mutual extrusion force between the bearing sleeve 71 and the inner wall of the second through-cavity 64, thereby facilitating the connection of the bearing 7 to the bearing housing 6.

[0324] In some embodiments, the bearing housing 6 is provided with a stopper 65 , which is located at the opening of the second cavity 64 toward the induced draft fan 4 . The stopper 65 cooperates with the bearing sleeve 71 to prevent the bearing 7 from escaping from the second cavity 64 .

[0325] In some embodiments, the bearing housing 6 is provided with a connecting block 66, which is located within the second through cavity 64. The bearing sleeve 71 is provided with a third installation space 712 corresponding to the connecting block 66, and the third installation space 712 is located on the outer periphery of the bearing sleeve 71. The connecting block 66 is provided in the third installation space 712 to locate the installation position of the bearing 7 within the second through cavity 64.

[0326] In some embodiments, the outer periphery of the bearing sleeve 71 is provided with buffer ribs 713. The buffer ribs 713 protrude from the outer surface of the bearing sleeve 71 and abut against the inner wall of the second through cavity 64 to cushion the vibration impact between the first housing 31 and the connecting shaft 900. This prevents the vibration impact generated during the operation of the first fan 8 and the induced draft fan 4 from being transmitted to the first housing 31.

[0327] In order to facilitate the installation of the bearing housing 6, as shown in Figures 35 to 37, the second casing connection part 18 is provided with a first installation space 181, and the first installation space 181 extends along the length direction of the casing 1. The bearing housing 6 is arranged in the first installation space 181 to position the installation position of the bearing housing 6 in the second casing connection part 18.

[0328] In some embodiments, a accommodating cavity is provided in the second casing connection portion 18, the opening of the accommodating cavity is set toward the top of the casing 1 and is connected to the first installation space 181, and a first support platform 183 is provided in the accommodating cavity. The first support platform 183 abuts against the bottom of the bearing housing 6 to support the bearing housing 6.

[0329] In some embodiments, the bearing housing 6 is provided with at least one extension portion 63, which is provided in the accommodating cavity to locate the connection position between the bearing housing 6 and the second casing connecting portion 18. It should be noted that the at least one extension portion 63 includes two extension portions 63, which are respectively located on the outside of the bearing housing 6 and extend along the height direction of the casing 1. The two extension portions 63 are respectively arranged opposite to each other along the length direction of the casing 1 and there is a gap between them. The first support platform 183 is located between the two extension portions 63. It should also be noted that the accommodating cavity includes a first accommodating cavity and a second accommodating cavity, and the first accommodating cavity and the second accommodating cavity are arranged side by side, the first accommodating cavity is arranged close to the fresh air module, and the second accommodating cavity is arranged close to the induced draft fan 4. The two extension portions 63 are correspondingly arranged in the first accommodating cavity and the second accommodating cavity to further position the bearing housing 6.

[0330] In other embodiments, the clamping portion 62 is disposed on the extension portion 63 within the first accommodating cavity and is located on a side of the extension portion 63 facing away from the other extension portion 63. The second housing connecting portion 18 defines a second installation space 184 that communicates with the first accommodating cavity 821. The clamping portion 62 is disposed within the second installation space 184 to connect the bearing housing 6 to the second housing connecting portion 18.

[0331] In some embodiments, the bearing housing 6 further includes at least one support portion 61 connected to the tops of the two extension portions 63. At least one second support platform 182 is also provided within the accommodating cavity, with the support portion 61 located atop the second support platform 182 to support the bearing housing 6. It should be noted that the at least one support portion 61 comprises two support portions 61, which are symmetrically arranged along the thickness direction of the housing 1. Furthermore, the at least one second support platform 182 also includes two second support platforms 182, which are arranged in a one-to-one correspondence with the two support portions 61.

[0332] It should be noted that the clamping portion 62 is located on the extension portion 63 close to the second connecting portion, the clamping portion 62 is located below the second connecting portion and has a certain gap with the second connecting portion, the second installation space 184 is opened on the side wall of the accommodating cavity close to the first shell 31, the second installation space 184 is located below the first installation space 181 and is connected to the first installation space 181.

[0333] In the above-mentioned air-conditioning indoor unit, the connecting shaft 900 is arranged in the shaft hole 831, the clamping ring 200 is arranged in the fifth installation space 93, the clamping ring is arranged in the accommodating cavity 821 and abuts against the inner wall of the end connecting the accommodating cavity 821 and the shaft hole 831 to prevent the first fan 8 from moving along the connecting shaft 900 toward the direction close to the induced draft fan 4, at least part of the constraint part 91 passes through the shaft hole 831, and the fastener 201 is connected to the constraint part 91 to prevent the first fan 8 from moving along the connecting shaft 900 toward the direction away from the induced draft fan 4, and the clamping ring 200 cooperates with the fifth installation space 93, and the fastener 201 cooperates with the constraint part 91 to limit the connection position of the first fan 8 and the connecting shaft 900, and the connecting shaft 900 is fixedly connected to the first fan 8.

[0334] The operating principle of the air conditioning indoor unit is as follows: the first motor 5 drives the first fan 8 and the induced draft fan 4. When the fresh air function needs to be turned off, the second motor 363 drives the gear-driven rack 362 to move, causing the baffle 361 to move linearly, closing the first air inlet 37 and preventing outdoor fresh air from entering the purification chamber 331. When the fresh air function needs to be turned on, the second motor 363 drives the gear-driven rack 362 to move, thereby driving the baffle 361 to move linearly, opening the first air inlet 37, allowing outdoor fresh air to enter the purification chamber 331. After being purified by the purification module 34, it enters the air supply chamber 321 and flows into the room through the first air outlet 35.

[0335] The above-mentioned air-conditioning indoor unit is provided with a reinforcing shaft 1000 inside the induced draft fan 4 to reduce the axial deformation of the induced draft fan 4. The reinforcing shaft 1000 is coaxially arranged with the connecting shaft 900 and the rotating shaft of the first motor 5 and connected to each other to increase the reliability of the operation of the induced draft fan 4 and the first fan 8 and reduce the noise generated by the operation of the air-conditioning indoor unit.

[0336] Figures 58 to 84 are a specific implementation of the air-conditioning indoor unit disclosed in the present invention. In this embodiment, the air-conditioning indoor unit includes a casing 1, a heat exchanger 4000, a fresh air module, an induced draft fan 9, a first motor 5, a bearing 7 and a bearing seat 80.

[0337] In the aforementioned air conditioning indoor unit, as shown in FIG58 , the casing 1 is configured to form the overall appearance of the air conditioning indoor unit. The casing 1 has a top and a bottom. The top and bottom of the casing 1 are opposite ends, and the height of the casing 1 is measured from the top to the bottom. The left side of the casing 1 and the right side of the casing 1 are opposite ends, and the length of the casing 1 is measured from the left to the right. The front side of the casing 1 and the rear side of the casing 1 are opposite ends, and the thickness of the casing 1 is measured from the front to the rear. In this embodiment, the air conditioning indoor unit is a wall-mounted unit, with the rear side of the casing 1 facing a wall. A heat exchange duct is defined within the casing 1. The casing 1 is provided with a second air inlet 11 and a second air outlet 15, each of which is connected to the heat exchange duct. The second air inlet 11 is located at the top of the casing 1 and is provided with a second grille to prevent debris from entering the interior of the casing 1. The second air outlet 15 is located on the lower front side of the housing 1. An air deflector 2 is provided at the second air outlet 15. The air deflector 2 is connected to the housing 1 in an openable and closable manner to open or close the second air outlet 15. It should be noted that the housing 1 also has an air supply vent 12 to allow outdoor fresh air to flow into the room through the air supply vent 12. In some embodiments, the air supply vent 12 is located to the left of the second air inlet 11 and is opened upward, so that the outdoor fresh air flows upward into the room, thereby preventing the outdoor fresh air from mixing with the conditioned air.

[0338] In some embodiments, as shown in Figures 61 and 63, the housing 1 is provided with a first mounting cavity 14, a second mounting cavity 13, and a third mounting cavity 16. The second mounting cavity 13, the first mounting cavity 14, and the third mounting cavity 16 are sequentially arranged along the length of the housing 1. The first mounting cavity 14 is configured to accommodate the induced draft fan 9. The second mounting cavity 13 is configured to accommodate the first motor 5. The third mounting cavity 16 is configured to accommodate the fresh air module.

[0339] In other embodiments, the third mounting cavity 16 is located to the left of the first mounting cavity 14, and the second mounting cavity 13 is located to the right of the first mounting cavity 14. The second mounting cavity 13 and the first mounting cavity 14 are separated from each other by a first mounting portion 17, and the first mounting cavity 14 and the third mounting cavity 16 are separated from each other by a second mounting portion 18. It should be noted that the third mounting cavity 16, the first mounting cavity 14, and the second mounting cavity 13 are arranged sequentially from left to right along the length of the housing 1.

[0340] In the aforementioned air conditioning indoor unit, as shown in Figures 59 and 60 , the heat exchanger 4000 is configured to heat the indoor air within the housing 1 to generate conditioned air. The heat exchanger 4000 is installed within the heat exchange air duct. It should be noted that the heat exchanger 4000 is positioned near the second air inlet 11. It should also be noted that the conditioned air can be cold air, hot air, or even air at room temperature.

[0341] In the aforementioned air conditioner indoor unit, as shown in FIG59 , the first motor 5 is configured to drive the first fan 10 and the induced draft fan 9. The first motor 5 is mounted within the second mounting cavity 13. In this embodiment, the first motor 5 is a single-shaft motor. The motor shaft of the first motor 5 is connected to the induced draft fan 9 to directly drive the induced draft fan 9. The induced draft fan 9 is connected to the first fan 10, indirectly driving the rotation of the first fan 10.

[0342] In the above-mentioned air conditioning indoor unit, as shown in Figures 67 and 68, the induced draft fan 9 is configured to draw indoor air into the interior of the housing 1. After heat exchange through the heat exchanger 4000 to form conditioned air, the conditioned air is then directed into the interior of the unit through the second air outlet 15 to meet the user's cooling or heating needs. The induced draft fan 9 is mounted in the first mounting cavity 14 and is located on the side of the heat exchanger 4000 facing away from the second air inlet 11. The end of the induced draft fan 9 away from the first motor 5 is connected to the first fan 10, so that the first motor 5 can drive the induced draft fan 9 and the first fan 10 to operate simultaneously. It should also be noted that the induced draft fan 9 is a cross-flow fan.

[0343] In some embodiments, the induced draft fan 9 extends along the length of the housing 1. A fan sleeve 920 is provided at the end of the induced draft fan 9 connected to the first motor 5. This sleeve 920 has a connecting hole, into which the rotating shaft of the first motor 5 extends, thereby connecting the first motor 5 to the induced draft fan 9. A connecting shaft is connected to the end of the induced draft fan 9 away from the first motor 5, and is connected to the first fan 10 via the connecting shaft, allowing the induced draft fan 9 and the first fan 10 to operate simultaneously. It should be noted that the axial length of the induced draft fan 9 is L1.

[0344] In other embodiments, the connecting shaft includes a drive shaft 910 and a fan shaft 106. The drive shaft 910 is connected to the end of the induced draft fan 9 away from the first motor. The fan shaft 106 is provided on the first fan 10. The drive shaft 910 and the fan shaft 106 are connected to each other via a coupling 60. The coupling 60 belongs to the relevant technology in this field and is not described in detail here.

[0345] In the aforementioned air conditioning indoor unit, as shown in Figures 59 to 61 , the fresh air module is configured to draw outdoor fresh air into the indoor space. The fresh air module includes a volute 3 and a first fan 10. The volute 3 is mounted in the third mounting cavity 16. A fresh air duct is defined within the volute 3. The first fan 10 is mounted within the fresh air duct. The fresh air duct is provided with a first air inlet 37 and a first air outlet 35. The first air inlet 37 communicates with the outside, and the first air outlet 35 communicates with the air supply 12. As the first fan 10 operates, outdoor fresh air is drawn into the fresh air duct through a pipeline via the first air inlet 37, passes through the first air outlet 35, and flows into the indoor space through the air supply 12. It should be noted that the fresh air duct is provided with a reserved hole 311, allowing the fan shaft 106 to pass through the reserved hole 311, be positioned outside the fresh air duct, and connect to the drive shaft 910, thereby enabling the first fan 10 to rotate synchronously with the induced draft fan 9.

[0346] Specifically, as shown in Figures 69 to 71, the volute 3 includes a first shell 31, a second shell 32, and a mounting shell 33. The first shell 31 and the second shell 32 are arranged opposite to each other and together form an air supply chamber 321. The first fan 10 is installed in the air supply chamber 321. The mounting shell 33 and the second shell 32 are arranged opposite to each other on the side facing away from the first shell 31 to together form a purification chamber 331. The second shell 32 is provided with a first grille 322, which is located at the connection between the purification chamber 331 and the air supply chamber 321 so that the purification chamber 331 and the air supply chamber 321 are connected to each other. A purification module 34 is provided in the purification chamber 331 to purify the outdoor fresh air flowing into the purification chamber 331. The first air inlet 37 is provided in the purification chamber 331, and the first air outlet 35 is provided in the air supply chamber 321, so that the purification module 34 purifies the outdoor fresh air entering the purification chamber 331 through the first air inlet 37, and the air in the purification chamber 331 that has been purified by the purification module 34 enters the air supply chamber 321 through the first grille 322, and flows into the room through the air supply port 12 through the first air outlet 35. It should be noted that the air supply chamber 321 and the purification chamber 331 together form a fresh air duct. It should also be noted that the reserved hole 311 is provided in the first shell 31, and the opening of the reserved hole 311 is arranged toward the induced draft fan 9, the reserved hole 311 is connected to the air supply chamber 321, and the gap dimension value between the first fan 10 and the first shell 31 along the length direction of the casing 1 is L2.

[0347] As shown in FIG. 76, since the dimension value L2 of the gap between the first fan 10 and the first housing 31 in the length direction of the housing 1 needs to be within a suitable range to ensure the fresh air volume of the fresh air module, and when the value of L2 is within this range, the noise transmitted to the room during the operation of the first fan 10 is relatively small. The dimension value L2 of the gap between the first fan 10 and the first housing 31 in the length direction of the housing 1 is affected by the axial length L1 of the induced draft fan 9, and the relationship between the two satisfies: 0.01L1 < L2 < 0.012L1. By determining the relationship between the dimension value L2 of the gap between the first fan 10 and the first housing 31 in the length direction of the housing 1 and the axial length L1 of the induced draft fan 9, after determining the axial length dimension of the induced draft fan 9, the dimension value L2 of the gap between the first fan 10 and the first housing 31 in the length direction of the housing 1 can be quickly determined.

[0348] In some embodiments, the purification module 34 includes a purification frame and a filter screen, and the filter screen is arranged on the purification frame. The filter screen is configured to filter and purify the outdoor fresh air to prevent impurities and flocs in the outdoor fresh air from entering the room. It should be noted that the purification chamber 331 is provided with a socket so that the purification module 34 can extend into the purification chamber 331 through the socket, thereby realizing the installation of the purification module 34. When the purification module 34 needs to be disassembled, the purification module 34 can be pulled out from the socket. By detachably installing the purification module 34 in the purification chamber 331, it is convenient for users to disassemble, clean and replace the filter screen by themselves. In this embodiment, the disassembly and installation methods of the purification module 34 are simple and easy to operate.

[0349] Since the first motor 5 drives the induced draft fan 9 and the first fan 10 to operate simultaneously, the first fan 10 cannot stop working alone, resulting in the inability to turn off the fresh air function when the air conditioner indoor unit is working. Therefore, the above-mentioned air conditioner indoor unit is provided with a switch assembly 36 at the first air inlet 37, and the switch assembly 36 is used to open or close the first air inlet 37 to control whether the outdoor fresh air is introduced into the purification chamber 331, thereby controlling the opening and closing of the fresh air function. When the air conditioner indoor unit is working, when the fresh air function needs to be turned off, closing the first air inlet 37 can prevent the outdoor fresh air from being introduced into the purification chamber 331, thereby preventing the outdoor fresh air from flowing into the room through the first air outlet 35. When the fresh air function needs to be turned on, opening the first air inlet 37 can make the outdoor fresh air be introduced into the purification chamber 331 through the first air inlet 37, so that the outdoor fresh air flows into the room through the first air outlet 35. It should be noted that closing the first air inlet 37 by the switch assembly 36 can also prevent the fresh air from flowing back into the room when the air conditioner indoor unit is turned off, reducing the indoor air noise and wind feeling when the fresh air function is not turned on, and improving the user experience.

[0350] Specifically, as shown in FIG69 , the switch assembly 36 includes a baffle 361, a second motor 363, a gear, and a rack 362. The baffle 361 is disposed at the first air outlet 35 in an openable and closable manner. The second motor 363 is mounted on the mounting housing 33. A gear is connected to the rotating shaft of the second motor 363. The baffle 361 is provided with a rack 362, which meshes with the gear. When the fresh air function is on, the second motor 363 drives the gear to drive the rack 362 to move, thereby driving the baffle 361 to move linearly, thereby opening the first air inlet 37 and allowing outdoor fresh air to enter the room. When the fresh air function is off, the second motor 363 drives the gear to drive the rack 362 to move, causing the baffle 361 to move linearly, thereby closing the first air inlet 37 and preventing outdoor fresh air from entering the room. It should be noted that closing the first air inlet 37 by the baffle 361 can also prevent fresh air from flowing back into the room when the air-conditioning indoor unit is turned off, thereby reducing the indoor air noise and wind feeling when the fresh air function is not turned on, and improving the user experience.

[0351] In the aforementioned air conditioner indoor unit, as shown in Figures 67, 68, and 72, the first fan 10 is configured to draw fresh air into the room. The first fan 10 is mounted within the air supply chamber 321. The operation of the first fan 10 draws fresh air from the outside into the air supply chamber 321 via a pipe via the first air inlet 37. After purification by the purification module 34, the fresh air enters the air supply chamber 321 and flows into the room through the first air outlet 35 and the air supply port 12.

[0352] Specifically, as shown in Figures 73 and 74, the first fan 10 includes a hub 111 and a plurality of blades 112. The blades 112 are spaced apart along the circumference of the hub 111 and fixedly connected to the hub 111. The blades 102 are distributed along the circumference of the hub 111 and form a circular base. The blades 112 surround the hub 111 to form a fan cavity. The fan cavity is located in the middle part of the circular base and is located on the side where the blades 112 are close to each other. The blades 112 are connected to each other by a connecting portion 103 on the side facing away from the cavity, so that the blades 112 can operate synchronously, thereby achieving the best working effect of the blades 112 as a whole. There are gaps between adjacent blades 112, and the gaps between adjacent blades 112 are connected to the fan cavity to form a fan outlet. The fan outlet is connected to the fan cavity and the first air outlet 35, so that airflow in the fan cavity can flow to the first air outlet 35. The fan cavity is also provided with a fan inlet, which is positioned toward the first grille 322. Indoor air within the air supply cavity 321 enters the fan cavity through the fan inlet and then flows out of the fan cavity through the fan outlet. The ends of the blades 112 facing away from the fan inlet are connected to a hub 111 and are integrally connected by the hub 111 to enhance the secure connection between the blades 112. The connecting portion 103 is located at the end of the blades 112 facing the air inlet. The connecting portion 103 and the hub 111 are respectively positioned at each end of the blades 112 to ensure a secure connection between the blades 112, thereby maximizing the overall operating efficiency of the blades 112. The connection portion 103 is connected only to the side of the blades 112 facing away from the cavity. This is to prevent the connection portion 103 from being too large and affecting the working performance of the blades 112. Furthermore, the connection portion 103 is integrally injection-molded with the blades 112. Reducing the area of ​​the connection portion 103 can reduce the overall weight of the first fan 10. It should be noted that the side of the hub 111 facing away from the blades 112 is positioned toward the first shell 31, and a certain gap is provided between the hub 111 and the first shell 31 along the length of the housing 1 to ensure the reliability of the operation of the first fan 10. It should also be noted that the first fan 10 is a centrifugal fan.

[0353] In some embodiments, the first fan 10 is provided with a connecting cavity 104 , a fan shaft 106 is provided in the connecting cavity 104 , and a fixing portion 105 is provided in the connecting cavity 104 , and one end of the fan shaft 106 away from the driving shaft 910 is connected to the fixing portion 105 .

[0354] In other embodiments, the fixing portion 105 and the inner wall of the connecting cavity 104 opening toward the connecting cavity 104 jointly define a receiving cavity, and the end of the fan shaft 106 away from the drive shaft 910 extends into the receiving cavity to increase the strength of the connection between the fan shaft 106 and the fixing portion 105.

[0355] In some embodiments, the connecting cavity 104 is formed by a middle portion of the hub 111 protruding in a direction away from the reserved hole 311 , and the opening of the connecting cavity 104 is arranged toward the reserved hole 311 .

[0356] In the related art, there is no direct connection between the first fan 10 and the first shell 31 in the length direction of the casing 1, resulting in a large difference between the actual value and the theoretical value of the gap size between the first fan 10 and the first shell 31. Therefore, in this embodiment, a connector 20 is provided, and one end of the connector 20 along the length direction of the casing 1 is fixedly connected to the first shell 31, and the other end of the connector 20 along the length direction of the casing 1 is relatively rotatably connected to the first fan 10 to ensure the reliability and stability of the connection relationship between the first fan 10 and the first shell 31, thereby reducing the deviation between the actual value and the theoretical value of the gap size. It should be noted that the connector 20 is provided with a connector cavity for the fan shaft 106 to pass through, so that the fan shaft 106 passes through the connector cavity and the reserved hole 311 to connect with the drive shaft 910.

[0357] Specifically, as shown in Figures 76 to 78, the connector 20 includes a first connector 202 and a second connector 201. The first connector 202 is connected to the first housing 31. The second connector 201 is connected to the first connector 202 at one end along the length of the housing 1, and the second connector 201 is rotatably connected to the first fan 10 at the other end along the length of the housing 1. The first connector 202 defines a first cavity 2021, which extends along the length of the housing 1 and penetrates the first connector 202. The second connector 201 defines a second cavity 2013, which communicates with the first cavity 2021 to form the connector cavity. This allows the fan shaft 106 to pass through the second cavity 2013 and connect the first cavity 2021 to the induced draft fan 9. It should be noted that the first cavity 2021 and the second cavity 2013 are each a cavity extending along the length of the housing 1.

[0358] In order to facilitate the rotational connection between the second connecting member 201 and the first fan 10, the first fan 10 is provided with a connecting cavity 104, and the connecting cavity 104 has a connecting cavity 104 opening arranged toward the reserved hole 311. The second connecting member 201 includes a contact portion 2012, which extends along the length direction of the housing 1. One end of the contact portion 2012 along the length direction of the housing 1 extends into the connecting cavity 104 and is connected to the first fan 10 for relative rotation. It should be noted that there is a gap between the end of the contact portion 2012 extending into the connecting cavity 104 and the inner wall of the connecting cavity 104. A movable member 30 is installed in the gap. The movable member 30 contacts the contact portion 2012 and the inner wall of the connecting cavity 104, so that the second connecting member 201 and the first fan 10 can rotate relative to each other. It should be noted that a shielding portion 2011 is provided at one end of the contact portion 2012 away from the connecting cavity 104. The shielding portion 2011 is connected to the first connecting member 202 and extends in a plane intersecting the opening of the connecting cavity 104. The shielding portion 2011 is located at the opening of the connecting cavity 104 to close the opening of the connecting cavity 104 and prevent the outdoor fresh air in the air supply cavity 321 from entering the connecting cavity 104. It should be noted that the movable member 30 is generally a ball, but may also be a roller. This belongs to the relevant technology in the field and will not be described in detail.

[0359] In order to facilitate the connection between the first connecting member 202 and the first shell 31, the first connecting member 202 is provided with a first protrusion 2022 and a second protrusion 2023, and the first protrusion 2022 and the second protrusion 2023 are respectively provided with mounting holes. The first shell 31 is provided with a connecting hole 312, and the connecting hole 312 is arranged corresponding to the mounting hole. Fasteners such as bolts or screws are arranged in the mounting hole and the corresponding connecting hole 312 to fix the first connecting member 202 to the first shell 31.

[0360] In some embodiments, the first connector 202 is detachably connected to the second connector 201. The first connector 202 is provided with a third protrusion 2024. The third protrusion 2024 and the shielding portion 2011 are each provided with a mounting hole. Fasteners such as bolts or screws are disposed in the mounting holes of the third protrusion 2024 and the shielding portion 2011 to securely connect the third protrusion 2024 to the shielding portion 2011. It should be noted that one end of the first protrusion 2022 along the length of the housing 1 contacts the first housing 31, and the other end of the first protrusion 2022 along the length of the housing 1 contacts the shielding portion 2011.

[0361] In other embodiments, the fan shaft 106 is provided with a rotating portion 107. The rotating portion 107 is disposed within the first cavity 2021 and is rotatable relative to the first cavity 2021 to support the rotation of the fan shaft 106, thereby increasing the stability of the first fan 10 during operation. It should be noted that a positioning portion 2025 is provided within the first cavity 2021. The positioning portion 2025 is disposed near the opening of the first cavity 2021 and cooperates with the rotating portion 107 to locate the installation position of the rotating portion 107 within the first cavity 2021.

[0362] In the above-described air conditioner indoor unit, the bearing 7 is sleeved around the outer periphery of the drive shaft 910 and is configured to support the rotation of the drive shaft 910. The bearing 7 is provided with a bearing cavity 714 for the drive shaft 910 to pass through, allowing the drive shaft 910 to pass through the bearing cavity 714, through the coupling 60, and to connect to the fan shaft 106. Specifically, as shown in Figures 79 to 81, the bearing 7 includes a bearing sleeve 71 and a bearing ball 72. The bearing cavity 714 is provided through the bearing sleeve 71 and the bearing ball 72. The two ends of the bearing cavity 714 are opened toward the first fan 10 and the induced draft fan 9, respectively. The drive shaft 910 is provided through the bearing cavity 714. It should be noted that a fourth installation space 715 is provided within the bearing sleeve 71. The fourth installation space 715 is connected to the bearing cavity 714 and is located near the induced draft fan 9. The bearing ball 72 is disposed within the fourth installation space 715 and is connected to the drive shaft 910.

[0363] In the above-mentioned air-conditioning indoor unit, the bearing seat 80 is configured to install the bearing 7 so that the bearing 7 can better support the drive shaft 910. The bearing seat 80 is arranged outside the bearing 7 and installed on the casing 1. Specifically, as shown in Figures 81 to 83, a first through cavity 84 is provided inside the bearing seat 80. The first through cavity 84 is configured to install the bearing 7. The bearing 7 is provided in the first through cavity 84 and the outer periphery of the bearing sleeve 71 is tightly fitted with the inner wall of the first through cavity 84, so that the bearing 7 is connected to the bearing seat 80. The first through cavity 84 extends along the length direction of the casing 1 so that the drive shaft 910 can extend into the first through cavity 84 to connect with the bearing 7 and pass through the first through cavity 84 to connect with the induced draft fan 4. It should be noted that a connecting platform is provided in the first through cavity 84, and the connecting platform is located in the first through cavity 84 and is arranged circumferentially along the first through cavity 84. The bearing sleeve 71 is provided with a connecting block 711, which is located on the outer periphery of the bearing sleeve 71 and arranged along the circumference of the bearing sleeve 71. The connecting block 711 abuts against the connecting platform, so that the bearing sleeve 71 is pressed and assembled with the inner wall of the first through-cavity 84, thereby fixedly connecting the bearing 7 to the bearing seat 80. It should also be noted that the connecting platform is connected to the inner wall of the first through-cavity 84, and the inner diameter of the connecting platform gradually decreases along the axial direction of the first through-cavity 84 as it approaches the induced draft fan 4. The closer the bearing sleeve 71 is to the induced draft fan 4, the greater the mutual extrusion force between the bearing sleeve 71 and the inner wall of the first through-cavity 84, thereby facilitating the connection of the bearing 7 to the bearing seat 80.

[0364] In some embodiments, the bearing seat 80 is provided with a stopper 85 , which is located at the opening of the first cavity 84 toward the induced draft fan 4 , and the stopper 85 cooperates with the bearing sleeve 71 to prevent the bearing sleeve 71 from separating from the first cavity 84 .

[0365] In some embodiments, the bearing seat 80 is provided with a positioning block 86, which is located in the first through cavity 84. The bearing sleeve 71 is provided with a third installation space 712 corresponding to the positioning block 86, and the third installation space 712 is located on the outer periphery of the bearing sleeve 71. The positioning block 86 is provided in the third installation space 712 to locate the installation position of the bearing 7 in the first through cavity 84.

[0366] In some embodiments, a buffer rib 713 is provided on the outer periphery of the bearing sleeve 71. The buffer rib 713 is protruding from the outer surface of the bearing sleeve 71 and abuts against the inner wall of the first through cavity 84. On the one hand, the buffer rib 713 can facilitate the installation of the bearing sleeve 71 in the first through cavity 84. On the other hand, it can also increase the firmness of the abutment between the bearing sleeve 71 and the inner wall of the first through cavity 84, and can also protect the part of the bearing sleeve 71 that contacts the inner wall of the first through cavity 84.

[0367] In other embodiments, a reinforcement portion 716 is provided at one end of the bearing sleeve 71 facing the first shell 31 , and the bearing through cavity 714 is provided through the reinforcement portion 716 to increase the contact area between the drive shaft 910 and the bearing sleeve 71 .

[0368] In order to facilitate the installation of the bearing seat 80, as shown in Figures 65 and 66, the second mounting portion 18 is provided with a first mounting space 181, which extends along the length direction of the casing 1. The bearing seat 80 is arranged in the first mounting space 181 to position the bearing seat 80 in the installation position of the second mounting portion 18.

[0369] In some embodiments, a accommodating cavity is provided in the second mounting portion 18, the opening of the accommodating cavity is set toward the top of the casing 1 and is connected to the first mounting space 181, and a first support platform 183 is provided in the accommodating cavity, which abuts against the bottom of the bearing seat 80 to support the bearing seat 80.

[0370] In some embodiments, the bearing housing 80 is provided with at least one extension portion 830. The extension portion 830 is disposed in the accommodation cavity to locate the connection position between the bearing housing 80 and the second mounting portion 18. It should be noted that the at least one extension portion 830 includes two extension portions 830, and the two extension portions 830 are respectively located outside the bearing housing 80 and extend along the height direction of the housing 1. The two extension portions 830 are oppositely arranged along the length direction of the housing 1 and there is a gap between them. The first support platform 183 is located between the two extension portions 830. It should also be noted that the accommodation cavity includes a first accommodation cavity and a second accommodation cavity. The first accommodation cavity and the second accommodation cavity are arranged in parallel. The first accommodation cavity is close to the fresh air module, and the second accommodation cavity is close to the induced draft fan 9. The two extension portions 830 are correspondingly disposed in the first accommodation cavity and the second accommodation cavity to further position the bearing housing 80.

[0371] In some other embodiments, as shown in FIGS. 66 and 82, the clamping portion 820 is disposed on the extension portion 830 in the first accommodation cavity and is located on the side of the extension portion 830背离另一延伸部830. The second mounting portion 18 is provided with a second mounting space 184, and the second mounting space 184 is communicated with the first accommodation cavity. The clamping portion 820 is disposed in the second mounting space 184 to fixedly connect the bearing housing 80 and the second mounting portion 18, so as to mount the bearing housing 80 in the housing 1.

[0372] In some embodiments, as shown in FIG. 82, the bearing housing 80 is further provided with at least one support portion 810. The support portion 810 is connected to the tops of the two extension portions 830. As shown in FIG. 64, at least one second support platform 182 is further disposed in the accommodation cavity. The support portion 810 is located on the top of the second support platform 182 to support the bearing housing 80. It should be noted that the at least one support portion 810 includes two support portions 810, and the two support portions 810 are symmetrically arranged along the thickness direction of the housing 1. And the at least one second support platform 182 also includes two second support platforms 182, and the two second support platforms 182 are correspondingly arranged with the two support portions 810 one by one.

[0373] When the above air conditioner indoor unit is assembled, by determining the axial length L1 of the induced draft fan 9, according to the relational expression 0.01L1 < L2 < 0.012L1, the dimension value L2 of the gap between the first fan 10 and the first housing 31 along the length direction of the housing 1 can be quickly determined, thereby improving the assembly efficiency of the air conditioner indoor unit. Moreover, the dimension value of the gap between the first fan 10 and the first housing 31 is within a suitable range, the installation accuracy of the first fan 10 is high, and the noise transmitted to the room when the first fan 10 works is small and the fresh air volume is large.

[0374] Figures 85 to 110 are a specific implementation of the air-conditioning indoor unit disclosed in the present invention. In this embodiment, the air-conditioning indoor unit includes a casing 1, a heat exchanger 4000, a fresh air module, an induced draft fan 9, a first motor 5, a bearing 7 and a bearing seat 80.

[0375] In the aforementioned air conditioning indoor unit, as shown in FIG85 , the casing 1 is configured to form the overall appearance of the air conditioning indoor unit. The casing 1 has a top and a bottom. The top and bottom of the casing 1 are opposite ends, and the height of the casing 1 is measured from the top to the bottom. The left side of the casing 1 and the right side of the casing 1 are opposite ends, and the length of the casing 1 is measured from the left to the right. The front side of the casing 1 and the rear side of the casing 1 are opposite ends, and the thickness of the casing 1 is measured from the front to the rear. In this embodiment, the air conditioning indoor unit is a wall-mounted unit, with the rear side of the casing 1 facing a wall. A heat exchange duct is defined within the casing 1. The casing 1 is provided with a second air inlet 11 and a second air outlet 15, each of which is connected to the heat exchange duct. The second air inlet 11 is located at the top of the casing 1 and is provided with a second grille to prevent debris from entering the interior of the casing 1. The second air outlet 15 is located on the lower front side of the housing 1. An air guide plate 2 is provided at the second air outlet 15. The air guide plate 2 is connected to the housing 1 in an openable and closable manner to open or close the second air outlet 15. It should be noted that the housing 1 also has an air supply port 12 to allow outdoor fresh air to flow into the room through the air supply port 12. In some embodiments, the air supply port 12 is located to the left of the second air inlet 11 and is opened upward, so that the outdoor fresh air flows upward into the room.

[0376] In some embodiments, as shown in Figures 88 and 90, the housing 1 is provided with a first mounting cavity 14, a second mounting cavity 13, and a third mounting cavity 16. The second mounting cavity 13, the first mounting cavity 14, and the third mounting cavity 16 are sequentially arranged along the length of the housing 1. The first mounting cavity 14 is configured to accommodate the induced draft fan 9. The second mounting cavity 13 is configured to accommodate the first motor 5. The third mounting cavity 16 is configured to accommodate the fresh air module.

[0377] In other embodiments, the third mounting cavity 16 is located to the left of the first mounting cavity 14, and the second mounting cavity 13 is located to the right of the first mounting cavity 14. The second mounting cavity 13 and the first mounting cavity 14 are separated from each other by a first mounting portion 17, and the first mounting cavity 14 and the third mounting cavity 16 are separated from each other by a second mounting portion 18. It should be noted that the third mounting cavity 16, the first mounting cavity 14, and the second mounting cavity 13 are arranged sequentially from left to right along the length of the housing 1.

[0378] In the aforementioned air conditioning indoor unit, as shown in Figures 86 and 87 , the heat exchanger 4000 is configured to heat the indoor air within the housing 1 to generate conditioned air. The heat exchanger 4000 is installed within the heat exchange air duct. It should be noted that the heat exchanger 4000 is positioned near the second air inlet 11. It should also be noted that the conditioned air can be cold air, hot air, or even air at room temperature.

[0379] In the above-described air conditioner indoor unit, as shown in FIG86 , the first motor 5 is configured to drive the first fan 10 and the induced draft fan 9. The first motor 5 is mounted within the second mounting cavity 13. In this embodiment, the first motor 5 is a single-shaft motor. The motor shaft of the first motor 5 is connected to the induced draft fan 9 to directly drive the induced draft fan 9. The first fan 10 is connected to the induced draft fan 9 and rotates synchronously with the induced draft fan 9. The first motor 5 is connected to the first fan 10 via the induced draft fan 9 to indirectly drive the first fan 10.

[0380] In the above-mentioned air conditioning indoor unit, as shown in Figures 94 and 95, the induced draft fan 9 is configured to draw indoor air into the interior of the housing 1. After heat exchange through the heat exchanger 4000 to form conditioned air, the conditioned air is then directed into the interior of the housing through the second air outlet 15 to meet the user's cooling or heating needs. The induced draft fan 9 is mounted in the first mounting cavity 14 and is located on the side of the heat exchanger 4000 facing away from the second air inlet 11. The end of the induced draft fan 9 away from the first motor 5 is connected to the first fan 10 so that the first motor 5 can drive the induced draft fan 9 and the first fan 10 to operate simultaneously. It should also be noted that the induced draft fan 9 is a cross-flow fan.

[0381] In some embodiments, the induced draft fan 9 extends along the length of the housing 1. A fan sleeve 920 is provided at the end of the induced draft fan 9 connected to the first motor 5. The fan sleeve 920 has a connecting hole, into which the motor shaft of the first motor 5 extends, thereby connecting the first motor 5 to the induced draft fan 9. A connecting shaft is connected to the end of the induced draft fan 9 away from the first motor 5, and is connected to the first fan 10 via the connecting shaft, so that the induced draft fan 9 and the first fan 10 operate simultaneously.

[0382] In other embodiments, the connecting shaft includes a drive shaft 910 and a fan shaft 106. The drive shaft 910 is connected to the end of the induced draft fan 9 away from the first motor 5. The fan shaft 106 is provided on the first fan 10. The drive shaft 910 and the fan shaft 106 are connected to each other via a coupling 60. The coupling 60 belongs to the relevant technology in this field and is not described in detail here.

[0383] In the aforementioned air conditioning indoor unit, as shown in Figures 86 to 88 , the fresh air module is configured to draw outdoor fresh air into the indoor space. The fresh air module includes a volute 3 and a first fan 10. The volute 3 is mounted in the third mounting cavity 16. A fresh air duct is defined within the volute 3. The first fan 10 is mounted within the fresh air duct. The fresh air duct is connected to a first air inlet 37 and a first air outlet 35. The first air inlet 37 communicates with the outdoors, while the first air outlet 35 communicates with the air supply 12. As the first fan 10 operates, outdoor fresh air is drawn into the fresh air duct through a pipeline at the first air inlet 37, passes through the first air outlet 35, and flows into the indoor space through the air supply 12. It should be noted that the volute 3 has a reserved hole 311 connected to the fresh air duct. This allows the fan shaft 106 to extend through the reserved hole 311 to the outside of the fresh air duct and connect to the drive shaft 910, thereby enabling the first fan 10 to rotate synchronously with the induced draft fan 9.

[0384] Specifically, as shown in Figures 96 to 98, the volute 3 includes a first shell 31, a second shell 32, and a mounting shell 33. The first shell 31 and the second shell 32 are arranged opposite to each other and together form an air supply chamber 321, in which the first fan 10 is installed. The mounting shell 33 and the second shell 32 are arranged opposite to each other on the side facing away from the first shell 31 to together form a purification chamber 331. The second shell 32 is provided with a first grille 322, which is located at the connection between the purification chamber 331 and the air supply chamber 321 so that the purification chamber 331 and the air supply chamber 321 are connected to each other. A purification module 34 is provided in the purification chamber 331 to purify the outdoor fresh air flowing into the purification chamber 331. The first air inlet 37 is provided in the purification chamber 331, and the first air outlet 35 is provided in the air supply chamber 321, so that the purification module 34 purifies the outdoor fresh air entering the purification chamber 331 through the first air inlet 37, and the air in the purification chamber 331 that has been purified by the purification module 34 enters the air supply chamber 321 through the first grille 322, and flows into the room through the air supply port 12 through the first air outlet 35. It should be noted that the air supply chamber 321 and the purification chamber 331 together form a fresh air duct. It should also be noted that the reserved hole 311 is provided in the first shell 31, and the opening of the reserved hole 311 is arranged toward the induced draft fan 9, and the reserved hole 311 is connected to the air supply chamber 321.

[0385] In some embodiments, the purification module 34 includes a purification frame and a filter. The filter is disposed on the purification frame and is configured to filter and purify the outdoor fresh air to prevent impurities and flocculent matter contained in the outdoor fresh air from entering the room. It should be noted that the purification chamber 331 is provided with a socket so that the purification module 34 can be inserted into the purification chamber 331 through the socket, thereby enabling installation of the purification module 34. When the purification module 34 needs to be removed, the purification module 34 can be removed from the socket. By detachably installing the purification module 34 in the purification chamber 331, it is convenient for the user to disassemble, clean, and replace the filter. In this embodiment, the removal and installation of the purification module 34 are simple and easy to operate.

[0386] Because the first motor 5 drives the induced draft fan 9 and the first fan 10 to operate simultaneously, the first fan 10 cannot be stopped independently, resulting in the inability to turn off the fresh air function when the air conditioner indoor unit is operating. Therefore, the air conditioner indoor unit is provided with a switch assembly 36 at the first air inlet 37. The switch assembly 36 is used to open or close the first air inlet 37 to control whether outdoor fresh air is introduced into the purification chamber 331, thereby controlling the on and off of the fresh air function. When the air conditioner indoor unit is operating, if it is necessary to turn off the fresh air function, closing the first air inlet 37 prevents outdoor fresh air from being introduced into the purification chamber 331, thereby preventing outdoor fresh air from flowing into the room through the first air outlet 35. When it is necessary to turn on the fresh air function, opening the first air inlet 37 allows outdoor fresh air to be introduced into the purification chamber 331 through the first air inlet 37, thereby allowing outdoor fresh air to flow into the room through the first air outlet 35. It should be noted that closing the first air inlet 37 by the switch assembly 36 can also prevent fresh air from flowing back into the room when the air-conditioning indoor unit is turned off, thereby reducing indoor air noise and wind sensation when the fresh air function is not turned on, and improving the user experience.

[0387] Specifically, as shown in FIG96 , the switch assembly 36 includes a baffle 361, a second motor 363, a gear, and a rack 362. The baffle 361 is disposed at the first air outlet 35 in an openable and closable manner. The second motor 363 is mounted on the mounting housing 33. A gear is connected to the rotating shaft of the second motor 363. The baffle 361 is provided with a rack 362, which meshes with the gear. When the fresh air function is on, the second motor 363 drives the gear to drive the rack 362 to move, which in turn drives the baffle 361 to move linearly, thereby opening the first air inlet 37 and allowing outdoor fresh air to enter the room. When the fresh air function is off, the second motor 363 drives the gear to drive the rack 362 to move, and the baffle 361 moves linearly, thereby closing the first air inlet 37 and preventing outdoor fresh air from entering the room. It should be noted that closing the first air inlet 37 by the baffle 361 can also prevent fresh air from flowing back into the room when the air-conditioning indoor unit is turned off, thereby reducing the indoor air noise and wind feeling when the fresh air function is not turned on, and improving the user experience.

[0388] In the aforementioned air conditioner indoor unit, as shown in Figures 94, 95, and 99, the first fan 10 is configured to draw fresh air into the room. The first fan 10 is installed within the air supply chamber 321. The operation of the first fan 10 draws fresh air from the outside into the air supply chamber 321 through the first air inlet 37. After purification by the purification module 34, the fresh air enters the air supply chamber 321 and flows into the room through the first air outlet 35 and the air supply port 12.

[0389] Specifically, as shown in Figures 100 and 101, the first fan 10 includes a hub 111 and a plurality of blades 112. The blades 112 are spaced apart along the circumference of the hub 111 and fixedly connected to the hub 111. The blades 112 are distributed along the circumference of the hub 111 and form a circular base. The blades 112 surround the hub 111 along the circumference to form a fan cavity. The fan cavity is located in the middle part of the circular base, and the fan cavity is located on the side where the blades 112 are close to each other. The blades 112 are connected to each other by a connecting portion 103 on the side facing away from the cavity, so that the blades 112 can operate synchronously, thereby achieving the best working effect of the blades 112 as a whole. There are gaps between adjacent blades 112, and the gaps between adjacent blades 112 are connected to the fan cavity to form a fan outlet. The fan outlet is connected to the fan cavity and the first air outlet 35, so that airflow in the fan cavity can flow to the first air outlet 35. The fan cavity is also provided with a fan inlet, which is positioned toward the first grille 322. Indoor air entering the air supply cavity 321 through the first grille 322 enters the fan cavity through the fan inlet and then flows out of the fan cavity through the fan outlet. The ends of the blades 112 facing away from the fan inlet are connected to a hub 111 and are integrally connected via the hub 10 to enhance the secure connection between the blades 112. The connecting portion 103 is located at the end of the blades 112 facing the air inlet. The connecting portion 103 and the hub 111 are respectively positioned at each end of the blades 112 to ensure a secure connection between the blades 112, thereby maximizing the overall operating efficiency of the blades 112. The connection portion 103 is connected only to the side of the blades 112 facing away from the cavity. This is to prevent the connection portion 103 from being too large and affecting the working performance of the blades 112. Furthermore, the connection portion 103 is integrally injection-molded with the blades 112. Reducing the area of ​​the connection portion 103 can reduce the overall weight of the first fan 10. It should be noted that the side of the hub 111 facing away from the blades 112 is positioned toward the first shell 31, and a certain gap is provided between the hub 111 and the first shell 31 along the length of the housing 1 to ensure the reliability of the operation of the first fan 10. It should also be noted that the first fan 10 is a centrifugal fan.

[0390] In some embodiments, the first fan 10 is provided with a connecting cavity 104 , a fan shaft 106 is provided in the connecting cavity 104 , and a fixing portion 105 is provided in the connecting cavity 104 , and one end of the fan shaft 106 away from the driving shaft 910 is connected to the fixing portion 105 .

[0391] In other embodiments, the fixing portion 105 and the inner wall of the connecting cavity 104 opening toward the connecting cavity 104 jointly define a receiving cavity, and the end of the fan shaft 106 away from the drive shaft 910 extends into the receiving cavity to increase the strength of the connection between the fan shaft 106 and the fixing portion 105.

[0392] In some embodiments, the connecting cavity 104 is formed by a middle portion of the hub 111 protruding in a direction away from the reserved hole 311 , and the opening of the connecting cavity 104 is arranged toward the reserved hole 311 .

[0393] In the related art, there is no direct connection between the first fan 10 and the first shell 31 in the length direction of the casing 1, resulting in a large difference between the actual value and the theoretical value of the gap size between the first fan 10 and the first shell 31. Therefore, in this embodiment, a connector 20 is provided. One end of the connector 20 along the length direction of the casing 1 is fixedly connected to the first shell 31, and the other end of the connector 20 along the length direction of the casing 1 is relatively rotatably connected to the first fan 10 to ensure the reliability and stability of the connection relationship between the first fan 10 and the first shell 31, thereby reducing the deviation between the actual value and the theoretical value of the gap size. It should be noted that the connector 20 is provided with a connector cavity for the fan shaft 106 to pass through, so that the fan shaft 106 passes through the connector cavity and the reserved hole 311 to connect with the drive shaft 910.

[0394] Specifically, as shown in Figures 102 to 104, the connector 20 includes a first connector 202 and a second connector 201. The first connector 202 is connected to the first housing 31. The second connector 201 is connected to the first connector 202 at one end along the length of the housing 1, and the second connector 201 is rotatably connected to the first fan 10 at the other end along the length of the housing 1. The first connector 202 defines a first cavity 2021, which is arranged along the length of the housing 1 and extends through the first connector 202. The second connector 201 defines a second cavity 2013, which communicates with the first cavity 2021 to form the connector cavity. This allows the fan shaft 106 to pass through the second cavity 2013 and connect the first cavity 2021 to the induced draft fan 9. It should be noted that the first cavity 2021 and the second cavity 2013 are each a cavity extending along the length of the housing 1.

[0395] In order to facilitate the rotational connection between the second connecting member 201 and the first fan 10, the first fan 10 is provided with a connecting cavity 104, and the connecting cavity 104 has a connecting cavity 104 opening arranged toward the reserved hole 311. The second connecting member 201 includes a contact portion 2012, which extends along the length direction of the housing 1. One end of the contact portion 2012 along the length direction of the housing 1 extends into the connecting cavity 104 and is connected to the first fan 10 for relative rotation. It should be noted that there is a gap between the end of the contact portion 2012 extending into the connecting cavity 104 and the inner wall of the connecting cavity 104. A movable member 30 is installed in the gap. The movable member 30 contacts the contact portion 2012 and the inner wall of the connecting cavity 104, so that the second connecting member 201 and the first fan 10 can rotate relative to each other. It should be noted that a shielding portion 2011 is provided at one end of the contact portion 2012 away from the connecting cavity 104. The shielding portion 2011 is connected to the first connecting member 202 and extends in a plane intersecting the opening of the connecting cavity 104. The shielding portion 2011 is located at the opening of the connecting cavity 104 to close the opening of the connecting cavity 104 and prevent the outdoor fresh air in the air supply cavity 321 from entering the connecting cavity 104. It should be noted that the movable member 30 is generally a ball, but may also be a roller. This belongs to the relevant technology in the field and will not be described in detail.

[0396] In order to facilitate the connection between the first connecting member 202 and the first shell 31, the first connecting member 202 is provided with a first protrusion 2022 and a second protrusion 2023, and the first protrusion 2022 and the second protrusion 2023 are respectively provided with mounting holes. The first shell 31 is provided with a connecting hole 312, and the connecting hole 312 is arranged corresponding to the mounting hole. Fasteners such as bolts or screws are arranged in the mounting hole and the corresponding connecting hole 312 to fix the first connecting member 202 to the first shell 31.

[0397] In some embodiments, the first connector 202 is detachably connected to the second connector 201. The first connector 202 is provided with a third protrusion 2024. The third protrusion 2024 and the shielding portion 2011 are each provided with a mounting hole. Fasteners such as bolts or screws are disposed in the mounting holes of the third protrusion 2024 and the shielding portion 2011 to securely connect the third protrusion 2024 to the shielding portion 2011. It should be noted that one end of the first protrusion 2022 along the length of the housing 1 contacts the first housing 31, and the other end of the first protrusion 2022 along the length of the housing 1 contacts the shielding portion 2011.

[0398] In other embodiments, the fan shaft 106 is provided with a rotating portion 107. The rotating portion 107 is disposed within the first cavity 2021 and is rotatable relative to the first cavity 2021 to support the rotation of the fan shaft 106, thereby increasing the stability of the first fan 10 during operation. It should be noted that a positioning portion 2025 is provided within the first cavity 2021. The positioning portion 2025 is disposed near the opening of the first cavity 2021 and cooperates with the rotating portion 107 to locate the installation position of the rotating portion 107 within the first cavity 2021.

[0399] In the aforementioned air conditioner indoor unit, the bearing 7 is sleeved around the outer periphery of the drive shaft 910 and is configured to support the rotation of the drive shaft 910. The bearing 7 is provided with a bearing cavity 714 for the drive shaft 910 to pass through, allowing the drive shaft 910 to pass through the bearing cavity 714, through the coupling 60, and to connect to the fan shaft 106. Specifically, as shown in Figures 105 to 107, the bearing 7 includes a bearing sleeve 71 and a bearing ball 72. The bearing cavity 714 is disposed through the bearing sleeve 71 and the bearing ball 72. The two ends of the bearing cavity 714 are opened toward the first fan 10 and the induced draft fan 9, respectively. The drive shaft 910 is disposed through the bearing cavity 714. It should be noted that a fourth installation space 715 is provided within the bearing sleeve 71. The fourth installation space 715 is connected to the bearing cavity 714 and is located near the induced draft fan 9. The bearing ball 72 is disposed within the fourth installation space 715 and is connected to the drive shaft 910.

[0400] In the above-mentioned air-conditioning indoor unit, the bearing seat 80 is configured to install the bearing 7 so that the bearing 7 can better support the drive shaft 910. The bearing seat 80 is arranged outside the bearing 7 and installed on the casing 1. Specifically, as shown in Figures 108 to 110, a first through cavity 84 is provided inside the bearing seat 80. The first through cavity 84 is configured to install the bearing 7. The bearing 7 is provided in the first through cavity 84 and the outer periphery of the bearing sleeve 71 is tightly fitted with the inner wall of the first through cavity 84, so that the bearing 7 is connected to the bearing seat 80. The first through cavity 84 extends along the length direction of the casing 1 so that the drive shaft 910 can extend into the first through cavity 84 to connect with the bearing 7 and pass through the first through cavity 84 to connect with the induced draft fan 4. It should be noted that a connecting platform is provided in the first through cavity 84, and the connecting platform is located in the first through cavity 84 and is arranged circumferentially along the first through cavity 84. The bearing sleeve 71 is provided with a connecting block 711, which is located on the outer periphery of the bearing sleeve 71 and arranged along the circumference of the bearing sleeve 71. The connecting block 711 abuts against the connecting platform, so that the bearing sleeve 71 is pressed and assembled with the inner wall of the first through-cavity 84, thereby fixedly connecting the bearing 7 to the bearing seat 80. It should also be noted that the connecting platform is connected to the inner wall of the first through-cavity 84, and the inner diameter of the connecting platform gradually decreases along the axial direction of the first through-cavity 84 as it approaches the induced draft fan 4. The closer the bearing sleeve 71 is to the induced draft fan 4, the greater the mutual extrusion force between the bearing sleeve 71 and the inner wall of the first through-cavity 84, thereby facilitating the connection of the bearing 7 to the bearing seat 80.

[0401] In some embodiments, the bearing seat 80 is provided with a stopper 85 , which is located at the opening of the first cavity 84 toward the induced draft fan 4 , and the stopper 85 cooperates with the bearing sleeve 71 to prevent the bearing sleeve 71 from separating from the first cavity 84 .

[0402] In some embodiments, the bearing seat 80 is provided with a positioning block 86, which is located in the first through cavity 84. The bearing sleeve 71 is provided with a third installation space 712 corresponding to the positioning block 86, and the third installation space 712 is located on the outer periphery of the bearing sleeve 71. The positioning block 86 is provided in the third installation space 712 to locate the installation position of the bearing 7 in the first through cavity 84.

[0403] In some embodiments, a buffer rib 713 is provided on the outer periphery of the bearing sleeve 71. The buffer rib 713 is protruding from the outer surface of the bearing sleeve 71 and abuts against the inner wall of the first through cavity 84. On the one hand, the buffer rib 713 can facilitate the installation of the bearing sleeve 71 in the first through cavity 84. On the other hand, it can also increase the firmness of the abutment between the bearing sleeve 71 and the inner wall of the first through cavity 84, and can also protect the part of the bearing sleeve 71 that contacts the inner wall of the first through cavity 84.

[0404] In other embodiments, a reinforcement portion 716 is provided at one end of the bearing sleeve 71 facing the first shell 31 , and the bearing through cavity 714 is provided through the reinforcement portion 716 to increase the contact area between the drive shaft 910 and the bearing sleeve 71 .

[0405] In order to facilitate the installation of the bearing seat 80, as shown in Figures 92 and 93, the second mounting portion 18 is provided with a first mounting space 181, which extends along the length direction of the casing 1. The bearing seat 80 is arranged in the first mounting space 181 to position the bearing seat 80 in the installation position of the second mounting portion 18.

[0406] In some embodiments, a accommodating cavity is provided in the second mounting portion 18, the opening of the accommodating cavity is set toward the top of the casing 1 and is connected to the first mounting space 181, and a first support platform 183 is provided in the accommodating cavity, which abuts against the bottom of the bearing seat 80 to support the bearing seat 80.

[0407] In some embodiments, the bearing seat 80 is provided with at least one extension portion 830, and the extension portion 830 is provided in the accommodating cavity to locate the connection position between the bearing seat 80 and the second mounting portion 18. It should be noted that the at least one extension portion 830 includes two extension portions 830, and the two extension portions 830 are respectively located on the outside of the bearing seat 80 and extend along the height direction of the casing 1. The two extension portions 830 are respectively arranged opposite to each other along the length direction of the casing 1 and there is a gap between them. The first support platform 183 is located between the two extension portions 830. It should also be noted that the accommodating cavity includes a first accommodating cavity and a second accommodating cavity, and the first accommodating cavity and the second accommodating cavity are arranged side by side, the first accommodating cavity is arranged close to the fresh air module, and the second accommodating cavity is arranged close to the induced draft fan 9. The two extension portions 830 are correspondingly arranged in the first accommodating cavity and the second accommodating cavity to further position the bearing seat 80.

[0408] In other embodiments, as shown in Figures 93 and 108, the clamping portion 820 is disposed on the extension portion 830 within the first accommodating cavity and is located on a side of the extension portion 830 facing away from the other extension portion 830. The second mounting portion 18 defines a second mounting space 184 that communicates with the first accommodating cavity. The clamping portion 820 is disposed within the second mounting space 184 to securely connect the bearing seat 80 to the second mounting portion 18, thereby mounting the bearing seat 80 within the housing 1.

[0409] In some embodiments, as shown in FIG108 , the bearing seat 80 further includes at least one support portion 810 connected to the tops of the two extension portions 830 . As shown in FIG91 , at least one second support platform 182 is further provided within the accommodating cavity, with the support portion 810 located on top of the second support platform 182 to support the bearing seat 80 . It should be noted that the at least one support portion 810 includes two support portions 810 symmetrically arranged along the thickness direction of the housing 1 . Furthermore, the at least one second support platform 182 also includes two second support platforms 182 , which are arranged in a one-to-one correspondence with the two support portions 810 .

[0410] The first fan 10 in the aforementioned air conditioning indoor unit is installed with high precision, and the actual value of the gap between the first fan 10 and the first housing 31 deviates slightly from the theoretical value. This results in low noise levels and a high volume of fresh air when the air conditioning indoor unit is in operation. The air conditioning indoor unit is fixedly connected to the first housing 31 and rotatably connected to the first fan 10 by a connector 20. This ensures a small deviation between the actual value of the gap between the first fan 10 and the inner wall of the first housing 31 and the theoretical value, thereby ensuring the installation precision of the first fan 10 within the air supply chamber 321. Furthermore, the connector 20 defines a connector cavity, allowing a connecting shaft to pass through the cavity to connect with the first fan 10 and drive the operation of the first fan 10. A rotating portion 107 is provided on the connecting shaft and disposed within the cavity to support the rotation of the connecting shaft, thereby enhancing the stability of the first fan 10 during operation.

[0411] Figures 111 to 133 are a specific implementation of the air-conditioning indoor unit disclosed in the present invention. In this embodiment, the air-conditioning indoor unit includes a casing 1, a heat exchanger, a fresh air module, an induced draft fan 4, a first motor 5, a connecting shaft 7 and a bearing 6000.

[0412] In the aforementioned air conditioning indoor unit, as shown in FIG111 , the casing 1 is configured to form the overall appearance of the air conditioning indoor unit. The casing 1 has a top and a bottom. The top and bottom of the casing 1 are opposite ends, and the height of the casing 1 is defined by the distance from the top to the bottom. The left side of the casing 1 and the right side of the casing 1 are opposite ends, and the width of the casing 1 is defined by the distance from the left to the right. The front side of the casing 1 and the rear side of the casing 1 are opposite ends, and the thickness of the casing 1 is defined by the distance from the front to the rear. In this embodiment, the rear side of the casing 1 is positioned toward a wall. The casing 1 is provided with a second air inlet 11 and a second air outlet 15, each of which is connected to the interior of the casing 1. The second air inlet 11 is located at the top of the casing 1 and is provided with a second grille to prevent debris from entering the interior of the casing 1. The second air outlet 15 is located at the lower front side of the housing 1. An air guide plate 2 is provided at the second air outlet 15. The air guide plate 2 is connected to the housing 1 in an openable and closable manner to open or close the second air outlet 15. It should be noted that the housing 1 also has an air supply port 12, through which outdoor fresh air flows into the room.

[0413] In some embodiments, the air supply port 12 is located on the left side of the second air inlet 11 and is opened upward so that outdoor fresh air flows into the room in an upward direction.

[0414] In some embodiments, as shown in Figures 113 and 115 , a first mounting cavity 14, a second mounting cavity 13, and a third mounting cavity 16 are provided within the housing 1. The second mounting cavity 13, the first mounting cavity 14, and the third mounting cavity 16 are sequentially arranged along the length of the housing 1. The first mounting cavity 14 is configured to accommodate the induced draft fan 4. The second mounting cavity 13 is configured to accommodate the first motor 5. The third mounting cavity 16 is configured to accommodate the fresh air module.

[0415] In other embodiments, the third mounting cavity 16 is located to the left of the first mounting cavity 14, and the second mounting cavity 13 is located to the right of the first mounting cavity 14. The second mounting cavity 13 and the first mounting cavity 14 are separated from each other by a first housing connection portion 17, and the first mounting cavity 14 and the third mounting cavity 16 are separated from each other by a second housing connection portion 18.

[0416] In the aforementioned air conditioner indoor unit, the heat exchanger is installed within the housing 1 and is configured to exchange heat with the indoor air within the housing 1 to generate conditioned air, thereby meeting the user's cooling or heating needs. It should be noted that the conditioned air can be cold air, hot air, or even room temperature air. It should also be noted that the heat exchanger is located near the second air inlet 11.

[0417] In the above-mentioned air conditioning indoor unit, as shown in Figures 117 and 118, the fresh air module is configured to introduce outdoor fresh air into the room. The fresh air module includes a volute 3 and a first fan 8. The volute 3 is installed in the third installation cavity 16. The volute 3 is provided with an air supply cavity 321 and a purification chamber 331. The purification chamber 331 is connected to the air supply cavity 321. The first fan 8 is installed in the air supply cavity 321. A purification module 34 is installed in the purification chamber 331 and is configured to purify the outdoor air. The purification chamber 331 is provided with a first air inlet 37, and the air supply cavity 321 is provided with a first air outlet 35. The first air inlet 37 is connected to the outside through a pipeline, and the first air outlet 35 is connected to the air supply 12. The first fan 8 is operated to introduce outdoor fresh air into the air supply chamber 321 through the pipeline from the first air inlet 37, enters the air supply chamber 321 after being purified by the purification module 34, and flows into the room through the first air outlet 35 and the air supply port 12.

[0418] In some embodiments, as shown in FIG118 , the volute 3 includes a mounting shell 33, a second shell 32, and a first shell 31. The mounting shell 33 and the second shell 32 are disposed opposite each other to form a purification chamber 331. The second shell 32 is disposed opposite the first shell 31 on a side facing away from the mounting shell 33 to form an air supply chamber 321. The second shell 32 is provided with a first grille 322 located at the junction of the purification chamber 331 and the air supply chamber 321 to connect the purification chamber 331 with the air supply chamber 321, thereby allowing air in the purification chamber 331, which has been purified by the purification module 34, to enter the air supply chamber 321.

[0419] In some embodiments, the purification module 34 includes a purification frame and a filter. The filter is mounted on the purification frame and is configured to filter and purify outdoor fresh air, preventing impurities and flocculent matter from entering the room. It should be noted that the purification frame is slidably connected to the purification chamber 331 to enable the sliding removal and installation of the purification module 34, thereby facilitating user removal, cleaning, and replacement of the filter.

[0420] In some embodiments, as shown in Figures 119 to 122, the first fan 8 is a centrifugal fan. The first fan 8 includes a hub 82, a plurality of first blades 81 and a plurality of second blades 823. The plurality of first blades 81 are arranged in sequence along the circumference of the hub 82 and are fixedly connected to the hub 82. The plurality of second blades 823 are located on the side of the hub 82 away from the first blades 81 and are arranged in sequence along the circumference of the hub 82. The second blades 823 are staggered with the first blades 81. It should be noted that the hub 82 is arranged relative to the first shell 31 and there is a certain gap between the two. The gap between the hub 82 and the first shell 31 is connected to the first air outlet 35. The second blades 823 are located on the side of the hub 82 facing the first shell 31, and the first blades 81 are located on the side of the hub 82 away from the first shell 31.

[0421] In other embodiments, as shown in Figure 120, the hub 82 is provided with a guide hole 832, and the guide hole 832 is arranged through the hub 82 along the length direction of the casing 1, so that outdoor fresh air can pass through the guide hole 832 into the gap between the hub 82 and the first shell 31, pass through the first air outlet 35, and flow into the room from the air supply port 12, thereby preventing the hub 82 from obstructing the flow of outdoor fresh air.

[0422] In some embodiments, as shown in FIG119 , the center portion of the hub 82 is provided with an axial hole 841 , which is arranged corresponding to the reserved hole. The connecting shaft 7 is arranged in the axial hole 841 to connect the connecting shaft 7 to the hub 82 .

[0423] In other embodiments, the hub 82 is provided with a connecting post 840, which is located in the center of the hub 82. The connecting post 840 extends from one end of the hub 82 toward the second blade 823. An axial hole 841 is defined in the connecting post 840 and extends through the connecting post 840 along the direction in which the connecting post 840 extends.

[0424] In other embodiments, the middle portion of the hub 82 protrudes in a direction away from the second fan blade 823 and forms a cavity, the connecting column 840 is arranged in the cavity, and the minimum value of the range of values ​​of the distance between the end of the connecting column 840 away from the hub 82 and the end of the second fan blade 823 away from the hub 82 is 0.

[0425] In the above-mentioned air conditioning indoor unit, as shown in Figures 112 and 123, the induced draft fan 4 is configured to draw indoor air into the interior of the casing 1 and to flow the conditioned air inside the casing 1 into the indoor space through the second air outlet 15. The induced draft fan 4 is installed in the first mounting cavity 14 and is located on the side of the heat exchanger facing away from the second air inlet 11. The induced draft fan 4 is connected to a first motor 5, which is installed in the second mounting cavity 13 to drive the induced draft fan 4 to operate. It should be noted that the end of the induced draft fan 4 away from the first motor 5 is connected to the first fan 8, so that the first motor 5 can drive the induced draft fan 4 and the first fan 8 to operate simultaneously.

[0426] In some embodiments, as shown in Figure 124, the induced draft fan 4 extends along the length direction of the casing 1, and a fan sleeve 410 is provided at one end of the induced draft fan 4 connected to the first motor 5. The fan sleeve 410 is provided with a connecting hole, and the rotating shaft of the first motor 5 extends into the connecting hole to connect the first motor 5 to the induced draft fan 4.

[0427] Because the first motor 5 simultaneously drives the induced draft fan 4 and the first fan 8, the first fan 8 cannot be stopped independently. Consequently, the fresh air function cannot be turned off while the air conditioner is operating. Therefore, as shown in FIG125 , the air conditioner is provided with a switch assembly 36 at the first air inlet 37. The switch assembly 36 is used to open or close the first air inlet 37 to control whether outdoor fresh air is introduced into the purification chamber 331, thereby controlling the on / off of the fresh air function. When the air conditioner is operating, if the fresh air function needs to be turned off, closing the first air inlet 37 prevents outdoor fresh air from being introduced into the purification chamber 331, thereby preventing outdoor fresh air from flowing into the room through the first air outlet 35. When the fresh air function needs to be turned on, opening the first air inlet 37 allows outdoor fresh air to be introduced into the purification chamber 331 through the first air inlet 37, thereby allowing outdoor fresh air to flow into the room through the first air outlet 35.

[0428] Specifically, as shown in FIG125 , the switch assembly 36 includes a baffle 361, a second motor 363, a gear, and a rack 362. The baffle 361 is disposed at the first air outlet 35 in an openable and closable manner. The second motor 363 is mounted on the mounting housing 33. A gear is connected to the rotating shaft of the second motor 363. The baffle 361 is provided with a rack 362, which meshes with the gear. When the fresh air function is on, the second motor 363 drives the gear to drive the rack 362 to move, thereby driving the baffle 361 to move linearly, thereby opening the first air inlet 37 and allowing outdoor fresh air to enter the room. When the fresh air function is off, the second motor 363 drives the gear to drive the rack 362 to move, causing the baffle 361 to move linearly, thereby closing the first air inlet 37 and preventing outdoor fresh air from entering the room. It should be noted that closing the first air inlet 37 by the baffle 361 can also prevent fresh air from flowing back into the room when the air-conditioning indoor unit is turned off, thereby reducing the indoor air noise and wind feeling when the fresh air function is not turned on, and improving the user experience.

[0429] In the above-described air conditioning indoor unit, as shown in Figures 123 and 124 , the connecting shaft 7 is configured to connect the induced draft fan 4 and the first fan 8. One end of the connecting shaft 7 is connected to the induced draft fan 4, and the other end of the connecting shaft 7 is connected to the first fan 8, so that the induced draft fan 4 and the first fan 8 operate simultaneously. It should be noted that to facilitate the connection of the connecting shaft 7 to the first fan 8 disposed in the air supply chamber 321, the first housing 31 is provided with a reserved hole, the opening of the reserved hole being arranged toward the induced draft fan 4, so that the connecting shaft 7 can pass through the reserved hole to connect to the first fan 8.

[0430] In the above-mentioned air conditioning indoor unit, the bearing 6000 is sleeved on the outer periphery of the connecting shaft 7 and is configured to support the rotation of the connecting shaft 7. As shown in Figures 126 to 128, the bearing 6000 includes a bearing sleeve 610 and a bearing ball 620. The bearing 6000 is provided with a bearing cavity 614, which extends through the bearing sleeve 610 and the bearing ball 620. The openings at both ends of the bearing cavity 614 are respectively arranged to face the first fan 8 and the induced draft fan 4. The connecting shaft 7 is arranged through the bearing cavity 614. It should be noted that a fourth installation space 615 is provided within the bearing sleeve 610. The fourth installation space 615 is connected to the bearing cavity 614 and is arranged near the induced draft fan 4. The bearing ball 620 is arranged in the fourth installation space 615. It should also be noted that a buffer rib 613 is provided on the outer periphery of the bearing sleeve 610 . The buffer rib 613 protrudes from the outer surface of the bearing sleeve 610 and abuts against the inner wall of the reserved hole 311 so that the bearing sleeve 610 seals the reserved hole 311 .

[0431] Since the connecting shaft 7 needs to drive the first fan 8 to rotate, a certain clearance is provided between the connecting shaft 7 and the reserved hole when the connecting shaft 7 passes through the reserved hole to prevent an interference fit between the two and thus preventing the connecting shaft 7 from rotating. However, the clearance between the connecting shaft 7 and the reserved hole can cause outdoor fresh air in the air supply chamber 321 to leak through the gap between the connecting shaft 7 and the reserved hole, resulting in condensation around the reserved hole and on the connecting shaft 7, thus affecting product quality. Therefore, as shown in Figure 129, this embodiment provides a bearing connection portion 3120 on the first housing 31, and a reserved hole 311 is provided within the bearing connection portion 3120, which is connected to the air supply chamber 321. By installing a bearing 6000 in the reserved hole 311, the bearing connection portion 3120 supports the bearing 6000 for rotation, while allowing outdoor fresh air leaking through the gap between the connecting shaft 7 and the reserved hole to enter the reserved hole 311, and the bearing 6000 seals the reserved hole 311, thereby preventing condensation around the reserved hole and on the connecting shaft 7.

[0432] Specifically, as shown in Figure 129, the bearing connection part 3120 is provided on the side of the first shell 31 facing the induced draft fan 4 and is located on the outer edge of the reserved hole. The bearing connection part 3120 is provided with a reserved hole 311, which is connected to the reserved hole, and the reserved hole 311 is connected to the air supply chamber 321. The openings at both ends of the reserved hole 311 are correspondingly arranged toward the first fan 8 and the induced draft fan 4. The bearing 6000 is located in the reserved hole 311 and the outer periphery of the bearing sleeve 610 abuts against the inner wall of the reserved hole 311 to close the reserved hole 311. It should be noted that, as shown in Figures 130 to 132, the bearing connection part 3120 is provided with a stopper 314, which is located at the opening of the reserved hole 311 facing the induced draft fan 4. The stopper 314 cooperates with the bearing sleeve 610 to prevent the bearing 6000 from escaping from the reserved hole 311.

[0433] In some embodiments, as shown in Figures 130 and 133, the bearing connection portion 3120 is provided with a connecting platform 315. The connecting platform 315 is located within the reserved hole 311 and is arranged circumferentially along the reserved hole 311. The bearing sleeve 610 is provided with a connecting block 611. The connecting block 611 is located on the outer periphery of the bearing sleeve 610 and is arranged circumferentially along the bearing sleeve 610. The connecting block 611 abuts against the connecting platform 315, so that the bearing sleeve 610 is pressed and assembled with the inner wall of the reserved hole 311, thereby sealing the reserved hole 311 and preventing outdoor fresh air from leaking and condensation. It should be noted that the connecting platform 315 is connected to the inner wall of the reserved hole 311, and the inner diameter of the connecting platform 315 gradually decreases along the axial direction of the reserved hole 311 as it approaches the induced draft fan 4. This ensures that the closer the bearing sleeve 610 is to the induced draft fan 4, the greater the mutual extrusion force between the bearing sleeve 610 and the inner wall of the reserved hole 311, thereby effectively sealing the reserved hole 311.

[0434] In some embodiments, the bearing connection portion 3120 is provided with a positioning block 313, which is located within the reserved hole 311. The bearing sleeve 610 is provided with a sixth installation space 612 corresponding to the positioning block 313, and the sixth installation space 612 is located on the outer periphery of the bearing sleeve 610. The positioning block 313 is provided in the sixth installation space 612 to locate the installation position of the bearing 6000 within the reserved hole 311.

[0435] In some embodiments, the bearing sleeve 610 is provided with a buffer rib 613 on its outer periphery. The buffer rib 613 protrudes from the outer surface of the bearing sleeve 610 and abuts against the inner wall of the reserved hole 311 to cushion the vibration between the first housing 31 and the connecting shaft 7. This prevents the vibration generated during the operation of the first fan 8 and the induced draft fan 4 from being transmitted to the first housing 31.

[0436] It should be noted that the bearing connection portion 3120 extends from within the air supply chamber 321 to the outside of the air supply chamber 321. The opening of the reserved hole 311 facing the first fan 8 is located within the air supply chamber 321, and the opening of the reserved hole 311 facing the induced draft fan 4 is also located within the air supply chamber 321. The minimum value of the inner diameter of the opening of the reserved hole 311 facing the first fan 8 is the outer diameter of the bearing sleeve 610. The maximum value of the inner diameter of the opening of the reserved hole 311 facing the induced draft fan 4 is the inner diameter of the bearing sleeve 610, so that the bearing 6000 can be installed in the reserved hole 311 through the opening in the air supply chamber 321. The bearing sleeve 610 is made of a soft material. This not only facilitates the installation of the bearing ball 620 in the fourth installation space 615 and the installation of the bearing sleeve 610 in the reserved hole 311, but also cushions and absorbs vibrations generated during the operation of the induced draft fan 4 and the first fan 8.

[0437] It should also be noted that, as shown in Figures 114 and 116, the second casing connection part 18 is provided with a first installation space 181, the first installation space 181 extends along the length direction of the casing 1, and the bearing connection part 3120 is provided in the first installation space 181, so that the second casing connection part 18 supports and limits the bearing connection part 3120.

[0438] The operating principle of the air conditioning indoor unit is as follows: the first motor 5 drives the first fan 8 and the induced draft fan 4. When the fresh air function is turned off, the second motor 363 drives the gear-driven rack 362 to move, causing the baffle 361 to move linearly, closing the first air inlet 37 and preventing outdoor fresh air from entering the purification chamber 331. When the fresh air function is turned on, the second motor 363 drives the gear-driven rack 362 to move, thereby driving the baffle 361 to move linearly, opening the first air inlet 37. Outdoor fresh air enters the purification chamber 331, where it is purified by the purification module 34 and then enters the air supply chamber 321. It then flows into the indoor space through the first air outlet 35. The outdoor fresh air in the air supply chamber 321 enters the reserved hole 311 through the gap between the connecting shaft 7 and the reserved hole. Because the bearing 6000 abuts the inner wall of the reserved hole 311, it seals the reserved hole 311, preventing outdoor fresh air from leaking out of the reserved hole 311.

[0439] The above-mentioned air-conditioning indoor unit is provided with a bearing connection part 3120 on the volute 3, and a reserved hole 311 is provided by using the bearing connection part 3120, and the reserved hole 311 is connected with the air supply chamber 321, so that the outdoor fresh air leaked from the gap between the connecting shaft 7 and the reserved hole in the air supply chamber 321 enters the reserved hole 311, and the reserved hole 311 is sealed under the action of the bearing 6000, thereby avoiding the leakage of outdoor fresh air and increasing the reliability and safety of the operation of the air-conditioning indoor unit.

[0440] Figures 134 to 160 are a specific implementation of the air-conditioning indoor unit disclosed in the present invention. In this embodiment, the air-conditioning indoor unit includes a casing 1, a heat exchanger, a fresh air module, an induced draft fan 4, a first motor 5, a connecting shaft 900 and a bearing 7.

[0441] In the aforementioned air conditioning indoor unit, as shown in FIG134 , the casing 1 is configured to form the overall appearance of the air conditioning indoor unit. The casing 1 has a top and a bottom. The top and bottom of the casing 1 are opposite ends, and the height of the casing 1 is defined by the distance from the top to the bottom. The left side of the casing 1 and the right side of the casing 1 are opposite ends, and the width of the casing 1 is defined by the distance from the left to the right. The front side of the casing 1 and the rear side of the casing 1 are opposite ends, and the distance from the front to the rear of the casing 1 is defined by the thickness of the casing 1. In this embodiment, the rear side of the casing 1 is positioned toward a wall. The casing 1 is provided with a second air inlet 11 and a second air outlet 15, each of which is connected to the interior of the casing 1. The second air inlet 11 is located at the top of the casing 1 and is provided with a second grille to prevent debris from entering the interior of the casing 1. The second air outlet 15 is located at the lower front side of the housing 1. An air guide plate 2 is provided at the second air outlet 15. The air guide plate 2 is connected to the housing in an openable and closable manner to open or close the second air outlet 15. It should be noted that the housing 1 is also provided with an air supply port 12, through which outdoor fresh air flows into the room.

[0442] In some embodiments, the air supply port 12 is located on the left side of the second air inlet 11 and is opened upward so that outdoor fresh air flows into the room in an upward direction.

[0443] In some embodiments, as shown in Figures 135, 136, and 138, a first mounting cavity 14, a second mounting cavity 13, and a third mounting cavity 16 are provided within the housing 1. The second mounting cavity 13, the first mounting cavity 14, and the third mounting cavity 16 are sequentially arranged along the length of the housing 1. The first mounting cavity 14 is configured to accommodate the induced draft fan 4. The second mounting cavity 13 is configured to accommodate the first motor 5. The third mounting cavity 16 is configured to accommodate the fresh air module.

[0444] In other embodiments, the third mounting cavity 16 is located to the left of the first mounting cavity 14, and the second mounting cavity 13 is located to the right of the first mounting cavity 14. The second mounting cavity 13 and the first mounting cavity 14 are separated from each other by a first housing connection portion 17, and the first mounting cavity 14 and the third mounting cavity 16 are separated from each other by a second housing connection portion 18.

[0445] In the aforementioned air conditioner indoor unit, the heat exchanger is installed within the housing 1 and is configured to exchange heat with the indoor air within the housing 1 to generate conditioned air, thereby meeting the user's cooling or heating needs. It should be noted that the conditioned air can be cold air, hot air, or even room temperature air. It should also be noted that the heat exchanger is located near the second air inlet 11.

[0446] In the above-mentioned air conditioning indoor unit, as shown in Figures 135, 142, and 143, the fresh air module is configured to introduce outdoor fresh air into the room. The fresh air module includes a volute 3 and a first fan 8. The volute 3 is installed in the third installation cavity 16. The volute 3 is provided with an air supply cavity 321 and a purification chamber 331. The purification chamber 331 is connected to the air supply cavity 321. The first fan 8 is installed in the air supply cavity 321. A purification module 34 is installed in the purification chamber 331 and is configured to purify the outdoor air. The purification chamber 331 is provided with a first air inlet 37, and the air supply cavity 321 is provided with a first air outlet 35. The first air inlet 37 is connected to the outside through a pipeline, and the first air outlet 35 is connected to the air supply 12. The first fan 8 is operated to introduce outdoor fresh air into the air supply chamber 321 through the pipeline from the first air inlet 37, enters the air supply chamber 321 after being purified by the purification module 34, and flows into the room through the first air outlet 35 and the air supply port 12.

[0447] In some embodiments, as shown in FIG143 , the volute 3 includes a mounting shell 33, a second shell 32, and a first shell 31. The mounting shell 33 and the second shell 32 are disposed opposite each other to form a purification chamber 331. The second shell 32 is disposed opposite the first shell 31 on a side facing away from the mounting shell 33 to form an air supply chamber 321. The second shell 32 is provided with a first grille 322 located at the junction of the purification chamber 331 and the air supply chamber 321 to connect the purification chamber 331 with the air supply chamber 321, thereby allowing air in the purification chamber 331 that has been purified by the purification module 34 to enter the air supply chamber 321.

[0448] In some embodiments, the purification module 34 includes a purification frame and a filter. The filter is mounted on the purification frame and is configured to filter and purify outdoor fresh air, preventing impurities and flocculent matter from entering the room. It should be noted that the purification frame is slidably connected to the purification chamber 331 to enable the sliding removal and installation of the purification module 34, thereby facilitating user removal, cleaning, and replacement of the filter.

[0449] In some embodiments, as shown in Figures 144 to 146, the first fan 8 is a centrifugal fan. The first fan 8 includes a hub 82, a plurality of first blades 81 and a plurality of second blades 823. The plurality of first blades are arranged in sequence along the circumference of the hub 82 and are fixedly connected to the hub 82. The plurality of second blades 823 are located on the side of the hub 82 away from the first blades 81 and are arranged in sequence along the circumference of the hub 82. The second blades 823 are staggered with the first blades 81. It should be noted that the hub 82 is arranged relative to the first shell 31 and there is a certain gap between the two. The gap between the hub 82 and the first shell 31 is connected to the first air outlet 35. The second blades 823 are located on the side of the hub 82 facing the first shell 31, and the first blades 81 are located on the side of the hub 82 away from the first shell 31.

[0450] In other embodiments, as shown in Figure 145, the hub 82 is provided with a guide hole 832, which is arranged to pass through the hub 82 along the length direction of the casing, so that outdoor fresh air can pass through the guide hole 832 into the gap between the hub 82 and the first shell 31, pass through the first air outlet 35, and flow into the room from the air supply port 12, thereby preventing the hub 82 from obstructing the flow of outdoor fresh air.

[0451] In some embodiments, as shown in FIG. 147 , a shaft hole 841 is provided in the central portion of the hub 82 , and the connecting shaft 900 is provided in the shaft hole 841 so as to connect the connecting shaft 900 to the hub 82 .

[0452] In other embodiments, the hub 82 is provided with a connecting post 840, which is located in the center of the hub 82. The connecting post 840 extends from one end of the hub 82 toward the second blade 823. An axial hole 841 is defined in the connecting post 840 and extends through the connecting post 840 along the direction in which the connecting post 840 extends.

[0453] In other embodiments, the middle portion of the hub 82 protrudes in a direction away from the second fan blade 823 and forms a cavity, the connecting column 840 is arranged in the cavity, and the minimum value of the range of values ​​of the distance between the end of the connecting column 840 away from the hub 82 and the end of the second fan blade 823 away from the hub 82 is 0.

[0454] In the aforementioned air conditioning indoor unit, as shown in Figures 135 and 147 , the induced draft fan 4 is configured to draw indoor air into the interior of the housing 1 and direct the conditioned air from the interior of the housing 1 into the interior of the room through the second air outlet 15. The induced draft fan 4 is mounted in the first mounting cavity 14 and is located on the side of the heat exchanger facing away from the second air inlet 11. The induced draft fan 4 is connected to a first motor 5, which is mounted in the second mounting cavity 13 to drive the induced draft fan 4. It should be noted that the end of the induced draft fan 4 away from the first motor 5 is connected to the first fan 8, so that the first motor 5 can drive the induced draft fan 4 and the first fan 8 to operate simultaneously.

[0455] In some embodiments, as shown in Figure 149, the induced draft fan 4 extends along the length direction of the casing 1, and a fan sleeve 410 is provided at one end of the induced draft fan 4 connected to the first motor 5. The fan sleeve 410 is provided with a connecting hole, and the rotating shaft of the first motor 5 extends into the connecting hole to connect the first motor 5 to the induced draft fan 4.

[0456] Because the first motor 5 simultaneously drives the induced draft fan 4 and the first fan 8, the first fan 8 cannot be stopped independently. Consequently, the fresh air function cannot be turned off while the air conditioner is operating. Therefore, as shown in FIG150 , the air conditioner is provided with a switch assembly 36 at the first air inlet 37. The switch assembly 36 is used to open or close the first air inlet 37 to control whether outdoor fresh air is introduced into the purification chamber 331, thereby controlling the on / off of the fresh air function. When the air conditioner is operating, if the fresh air function needs to be turned off, closing the first air inlet 37 prevents outdoor fresh air from being introduced into the purification chamber 331, thereby preventing outdoor fresh air from flowing into the room through the first air outlet 35. When the fresh air function needs to be turned on, opening the first air inlet 37 allows outdoor fresh air to be introduced into the purification chamber 331 through the first air inlet 37, thereby allowing outdoor fresh air to flow into the room through the first air outlet 35.

[0457] Specifically, as shown in FIG150 , the switch assembly 36 includes a baffle 361, a second motor 363, a gear, and a rack 362. The baffle 361 is disposed at the first air outlet 35 in an openable and closable manner. The second motor 363 is mounted on the mounting housing 33. A gear is connected to the rotating shaft of the second motor 363. The baffle 361 is provided with a rack 362, which meshes with the gear. When the fresh air function is on, the second motor 363 drives the gear to drive the rack 362 to move, thereby driving the baffle 361 to move linearly, thereby opening the first air inlet 37 and allowing outdoor fresh air to enter the room. When the fresh air function is off, the second motor 363 drives the gear to drive the rack 362 to move, causing the baffle 361 to move linearly, thereby closing the first air inlet 37 and preventing outdoor fresh air from entering the room. It should be noted that closing the first air inlet 37 by the baffle 361 can also prevent fresh air from flowing back into the room when the air-conditioning indoor unit is turned off, thereby reducing the indoor air noise and wind feeling when the fresh air function is not turned on, and improving the user experience.

[0458] In the above-described air conditioning indoor unit, as shown in Figures 148 and 149 , a connecting shaft 900 is configured to connect the induced draft fan 4 and the first fan 8. One end of the connecting shaft 900 is connected to the induced draft fan 4, and the other end of the connecting shaft 900 is connected to the first fan 8, so that the induced draft fan 4 and the first fan 8 operate simultaneously. It should be noted that to facilitate the connection of the connecting shaft 900 with the first fan 8 disposed in the air supply chamber 321, the first housing 31 is provided with a reserved hole 311. The opening of the reserved hole 311 is disposed toward the induced draft fan 4. The reserved hole 311 is correspondingly disposed with the shaft hole 841, so that the connecting shaft 900 can pass through the reserved hole 311 to connect with the first fan 8. It should be noted that the inner diameter of the reserved hole 311 is the same as the diameter of the shaft hole 841.

[0459] In the above-mentioned air conditioning indoor unit, the bearing 7 is sleeved on the outer periphery of the connecting shaft 900 and is configured to support the rotation of the connecting shaft 900. As shown in Figures 149, 151, and 152, the bearing 7 includes a bearing sleeve 71 and a bearing ball 72. The bearing 7 is provided with a bearing cavity 714, which is provided through the bearing sleeve 71 and the bearing ball 72. The two ends of the bearing cavity 714 are opened correspondingly toward the first fan 8 and the induced draft fan 4. The connecting shaft 900 is provided through the bearing cavity 714. It should be noted that a fourth installation space 715 is provided in the bearing sleeve 71. The fourth installation space 715 is connected to the bearing cavity 714 and is located near the induced draft fan 4. The bearing ball 72 is provided in the fourth installation space 715.

[0460] In the aforementioned air conditioning indoor unit, as shown in Figures 154 to 157 , a bearing seat 601 is disposed outside the bearing 7 and connected to the housing 1 to facilitate the installation of the bearing 7, enabling the bearing 7 to better support the connecting shaft 900. A second cavity 64 is provided within the bearing seat 601. The second cavity 64 is configured to accommodate the bearing 7. The bearing 7 is disposed within the second cavity 64, and the outer periphery of the bearing 7 closely fits the inner wall of the second cavity 64, thereby securely connecting the bearing 7 to the bearing seat 601. The second cavity 64 extends along the length of the housing 1. The openings at both ends of the second cavity 64 are positioned toward the first housing 31 and the induced draft fan 4, respectively. This allows the connecting shaft 900 to extend into the second cavity 64, connect to the bearing 7, and then pass through the second cavity 64 to connect to the induced draft fan 4. A third installation space 642 is provided within the second through-cavity 64, circumferentially arranged along the inner wall of the second through-cavity 64. A connecting block 711 is provided on the outer periphery of the bearing sleeve 71, located within the third installation space 642 to restrict the installation position of the bearing 7 within the second through-cavity 64. It should be noted that the third installation space 642 divides the second through-cavity 64 into a first through-cavity 641 and a second through-cavity 643. The first through-cavity 641, the third installation space 642, and the second through-cavity 643 are sequentially arranged along the length of the housing 1 and interconnected. The first through-cavity 641 is located near the induced draft fan 4, and the second through-cavity 643 is located near the first housing 31. A positioning block 66 is provided at the junction of the first through-cavity 641 and the third installation space 642. The bearing sleeve 71 is provided with a sixth installation space 712, located within the sixth installation space 712 to connect the bearing 7 to the bearing seat 601. It should also be noted that the minimum value within the range of values ​​for the inner diameter of the third installation space 642 is the inner diameter of the second through-cavity 643. When the positioning block 66 is positioned within the sixth installation space 712, the end of the bearing 7, away from the stopper 65, abuts against the sidewall of the third installation space 642, near the second through-cavity 643, thereby strengthening the connection between the bearing 7 and the bearing seat 601. Furthermore, it should be noted that a stopper 65 is positioned within the first through-cavity 641, away from the third installation space 642, to prevent the bearing 7 from dislodging from the second through-cavity 64.

[0461] In some embodiments, the sidewall of the third installation space 642 close to the first through cavity 641 is an inclined surface, and the connecting block 711 abuts against the sidewall of the third installation space 642 so that the bearing sleeve 71 seals the second through cavity 64 .

[0462] In some embodiments, the outer periphery of the bearing sleeve 71 is provided with buffer ribs 713. The buffer ribs 713 protrude from the outer surface of the bearing sleeve 71 and abut against the inner wall of the second through cavity 643 to cushion the vibration impact between the first housing 31 and the connecting shaft 900. This prevents the vibration impact generated during the operation of the first fan 8 and the induced draft fan 4 from being transmitted to the first housing 31.

[0463] In order to facilitate the installation of the bearing seat 601, as shown in Figures 136 to 139, the second casing connection part 18 is provided with a first installation space 181, and the first installation space 181 extends along the length direction of the casing 1. The bearing seat 601 is arranged in the first installation space 181 to position the installation position of the bearing seat 601 in the second casing connection part 18.

[0464] In some embodiments, a accommodating cavity is provided in the second casing connection part 18, the opening of the accommodating cavity is set toward the top of the casing 1 and is connected to the first installation space 181, and a first support platform 183 is provided in the accommodating cavity. The first support platform 183 abuts against the bottom of the bearing seat 601 to support the bearing seat 601.

[0465] In some embodiments, as shown in Figures 155 and 156, the bearing seat 601 is provided with at least one extension portion 830, which is provided in the accommodating cavity to locate the connection position between the bearing seat 601 and the second housing connection portion 18. It should be noted that the at least one extension portion 830 includes two extension portions 830, which are respectively located on the outside of the bearing seat 601 and extend along the height direction of the housing 1. The two extension portions 830 are respectively arranged opposite each other along the length direction of the housing 1 with a gap therebetween. The first support platform 183 is located between the two extension portions 830. It should also be noted that the accommodating cavity includes a first accommodating cavity and a second accommodating cavity, which are arranged side by side, the first accommodating cavity being arranged near the fresh air module, and the second accommodating cavity being arranged near the induced draft fan 4. The two extension portions 830 are correspondingly arranged in the first accommodating cavity and the second accommodating cavity to further position the bearing seat 601.

[0466] In other embodiments, as shown in Figures 136 and 141, the clamping portion 62 is disposed on the extension portion 830 within the first accommodating cavity and is located on a side of the extension portion 830 facing away from the other extension portion 830. The second housing connecting portion 18 defines a second installation space 184 that communicates with the first accommodating cavity. The clamping portion 62 is disposed within the second installation space 184 to connect the bearing seat 601 to the second housing connecting portion 18.

[0467] In some embodiments, as shown in FIG156 , the bearing seat 601 further includes at least one support portion 61 connected to the tops of the two extension portions 830. At least one second support platform 182 is also provided within the accommodating cavity, with the support portion 61 located atop the second support platform 182 to support the bearing seat 601. It should be noted that the at least one support portion 61 includes two support portions 61, which are symmetrically arranged along the thickness direction of the housing 1. Furthermore, the at least one second support platform 182 also includes two second support platforms 182, which are arranged in a one-to-one correspondence with the two support portions 61.

[0468] Since the connecting shaft 900 needs to drive the first fan 8 to rotate, when the connecting shaft 900 passes through the reserved hole 311, there is a certain gap between the connecting shaft 900 and the reserved hole 311 to prevent the two from being overly fitted and causing the connecting shaft 900 to be unable to rotate. However, the gap between the connecting shaft 900 and the reserved hole 311 will cause the outdoor fresh air in the air supply chamber 321 to leak from the gap between the connecting shaft 900 and the reserved hole 311, resulting in condensation around the reserved hole 311 and on the connecting shaft 900, affecting product quality. Therefore, this embodiment sets a first connecting part 316 on the first shell 31 and a second connecting part 63 on the bearing seat 601, and uses the first connecting part 316 to connect the second connecting part 63 so that the air supply chamber 321 is connected with the second through cavity 64 inside the bearing 7 housing through the reserved hole 311, so that the outdoor fresh air leaked from the gap between the connecting shaft 900 and the reserved hole 311 enters the second through cavity 64, thereby preventing condensation around the reserved hole 311 and on the connecting shaft 900.

[0469] Specifically, as shown in FIG159 , the first connecting portion 316 is provided on the side of the first shell 31 facing the induced draft fan 4 and is located on the outer edge of the reserved hole 311. A second connecting portion 63 is provided on the end of the bearing seat 601 facing the reserved hole 311. The first connecting portion 316 is connected to the second connecting portion 63 to connect the air supply cavity 321 with the second through cavity 64, thereby allowing the outdoor fresh air leaking from the gap between the connecting shaft 900 and the reserved hole 311 to enter the second through cavity 64. It should be noted that since the bearing 7 is provided in the second through cavity 64 and the outer periphery of the bearing 7 is tightly fitted with the inner wall of the second through cavity 64, the bearing 7 has a sealing effect on the second through cavity 64, thereby preventing the outdoor fresh air in the second through cavity 64 from leaking.

[0470] In some embodiments, as shown in Figure 160, the first connecting portion 316 is a rib disposed along the outer edge of the reserved hole 311. The second connecting portion 63 is provided with a seventh installation space 68, with the notch of the seventh installation space 68 facing the first shell 31. The seventh installation space 68 cooperates with the rib so that the rib is located within the seventh installation space 68, thereby allowing outdoor fresh air leaking through the gap between the sealed reserved hole 311 and the connecting shaft 900 to enter the second through cavity 64. It should be noted that when the first shell 31 is connected to the bearing seat 601, the rib, the reserved hole 311, and the seventh installation space 68 are coaxially arranged. It should also be noted that in other embodiments, the inner diameter r of the seventh installation space 68 is 2 mm larger than the diameter D of the reserved hole 311, and the outer diameter R of the annular eighth installation space is 4 mm larger than the diameter D of the reserved hole 311, i.e., the width of the seventh installation space 68 is 2 mm. The rib width is 1.8 mm. In addition, it should be noted that, in other embodiments, the rib is integrally formed with the first shell 31 to simplify the product structure.

[0471] It should be noted that, as shown in Figures 154 and 157, the clamping portion 62 is located on the extension portion 830 near the second connecting portion 63. The clamping portion 62 is located below the second connecting portion 63 and has a certain gap between it and the second connecting portion 63. The second installation space 184 is opened on the side wall of the accommodating cavity near the first shell 31. The second installation space 184 is located below the first installation space 181 and is connected to the first installation space 181. It should also be noted that the bearing 7 abuts against the side wall of the third installation space 642 near the second through cavity 643, and can also seal the second through cavity 643 to prevent outdoor fresh air in the second through cavity 643 from entering the first through cavity 641.

[0472] The operating principle of the air conditioning indoor unit is as follows: the first motor 5 drives the first fan 8 and the induced draft fan 4. When the fresh air function needs to be turned off, the second motor 363 drives the gear-driven rack 362 to move, causing the baffle 361 to move linearly, closing the first air inlet 37 and preventing outdoor fresh air from entering the purification chamber 331. When the fresh air function needs to be turned on, the second motor 363 drives the gear-driven rack 362 to move, thereby driving the baffle 361 to move linearly, opening the first air inlet 37, allowing outdoor fresh air to enter the purification chamber 331. After being purified by the purification module 34, it enters the air supply chamber 321 and flows into the room through the first air outlet 35. The rib on the first shell 31 is arranged in the seventh installation space 68 of the bearing seat 601, and the outdoor fresh air in the air supply chamber 321 enters the second through cavity 643 through the gap between the connecting shaft 900 and the reserved hole 311. Since the bearing 7 is arranged in the third installation space 642 and the first through cavity 641, and abuts against the side wall of the third installation space 642 close to the second through cavity 643, the outdoor fresh air in the second through cavity 643 is prevented from entering the first through cavity 641, thereby preventing the outdoor fresh air from leaking.

[0473] The above-mentioned air-conditioning indoor unit is configured to have a first connecting portion 316 on the volute 3 and a second connecting portion 63 on the bearing seat 601, and utilizes the first connecting portion 316 to connect the second connecting portion 63 to connect the air supply chamber 321 in the volute 3 with the second through chamber 64, so that the outdoor fresh air leaking from the gap between the connecting shaft 900 and the reserved hole 311 in the air supply chamber 321 enters the second through chamber 64, and the second through chamber 64 is sealed under the action of the bearing 7, thereby avoiding leakage of outdoor fresh air and increasing the reliability and safety of the operation of the air-conditioning indoor unit.

[0474] As shown in Figures 161 to 168 , in one embodiment of the wall-mounted air conditioner disclosed herein, the wall-mounted air conditioner comprises: a housing 100, an indoor heat exchanger, a second fan 400, a volute 3, a first fan 300, and a first motor 500. The housing 100 is provided with a first inner cavity and a second inner cavity along its length. The housing 100 has an indoor air inlet at its top and an indoor air outlet at its front bottom.

[0475] The indoor heat exchanger is disposed within the first inner cavity and exchanges heat with the air passing through it to form a heat exchange airflow. A second fan 400 is disposed within the first inner cavity, positioned below the indoor heat exchanger. Indoor airflow enters the housing 100 through the indoor air inlet, exchanges heat in the indoor heat exchanger, and is then output through the indoor air outlet.

[0476] The volute 3 is disposed within the second inner cavity and is provided with a first air inlet and a first air outlet. The volute 3 is disposed at one end of the second fan 400. The volute 3 has a receiving cavity. The direction in which the volute 3 is away from the second fan 400 is defined as a first direction.

[0477] The first fan 300 is disposed in the volute 3. The first fan 300 is disposed in the volute 3. The first fan 300 includes a connecting plate and blades 403. The blades 403 are disposed on a side of the connecting plate away from the second fan 400. The connecting plate is close to the inner wall of the volute 3 near the second fan 400.

[0478] The first motor 500 drives the second fan 400 and the first fan 300 to rotate synchronously. The first motor 500 and / or the second fan 400 are connected to the first fan 300 via a connecting shaft.

[0479] The connecting shaft is connected to the connecting disk, and the end of the connecting shaft does not exceed the end surface of the blade 403 away from the connecting disk along the axial direction of the connecting shaft.

[0480] Through the above solution, the length of the connecting shaft connecting the first motor 500 and the first fan 300 is shortened. When the first motor 500 drives the fan to rotate, the stability of the first fan 300 during rotation is improved, friction between the first fan 300 and the volute 3 is avoided, and noise is reduced.

[0481] In some embodiments, the connecting shaft of the first motor 500 includes a first end 501 and a second end 502 , and the first end 501 of the connecting shaft passes through the volute 3 and is connected to the first fan 300 .

[0482] Referring to FIG. 181 , the distance between the end of the first end 501 of the connecting shaft and the end surface of the blade 403 away from the connecting disk is X, where X>0.

[0483] In some embodiments, the axes of the second fan 400, the connecting shaft, and the first fan 300 are collinear. The second fan 400 can be connected to the second end 502 of the connecting shaft using methods including, but not limited to, an interference fit, a plug-in connection, a snap-fit ​​connection, screws, or nuts 800. The first fan 300 can be connected to the first end 501 of the connecting shaft using methods including, but not limited to, an interference fit, a plug-in connection, a snap-fit ​​connection, screws, or nuts 800. When the first motor 500 is activated, the connecting shaft synchronously drives the second fan 400 and the first fan 300 on both sides to rotate.

[0484] In related art, the second fan 400 in a wall-mounted air conditioner is relatively long. To ensure a stable connection between the second end 502 of the first motor 500 and the second fan 400, the length of the connection between the second end 502 of the first motor 500 and the second fan 400 is increased. Consequently, the second end 502 of the first motor 500 is relatively long. However, in the production of the first motor 500, the first end 501 and the second end 502 of the first motor 500 are the same length. Because the first end 501 of the first motor 500 is also relatively long, the axial distance of the first fan 300 is relatively short. The longer the rotating connecting shaft, the less stable it is, and the ends of the connecting shaft may experience vibration or jitter. Furthermore, due to the significant difference in size and weight between the first fan 300 and the second fan 400, the loads at both ends of the connecting shaft are different, further increasing the instability of the first end 501 of the connecting shaft connected to the first fan 300. Vibration or jitter during rotation of the first fan 300 may cause contact or friction with the sidewall of the volute 3.

[0485] Through the above content in the present disclosure, the length of the first end 501 of the first motor 500 is shortened, the stability of the first fan 300 during rotation is improved, and the first fan 300 is prevented from vibrating or bouncing and causing friction on the side wall of the volute 3.

[0486] In some embodiments, the thickness direction of the volute 3 is the same as the axial direction of the first fan 300 .

[0487] As shown in Figures 161 to 168 , in some embodiments, the volute 3 includes a first half-shell 3001 and a second half-shell 3002. The first half-shell 3001 is located proximal to the first motor 500. The second half-shell 3002 is disposed on a side of the first half-shell 3001 away from the first motor 500. The first fan 300 is disposed within the accommodating cavity formed by the first half-shell 3001 and the second half-shell 3002. The thickness of the volute 3 is defined as the distance between the two side walls of the accommodating cavity along the length of the first fan 300.

[0488] The first motor 500 is positioned between the second fan 400 and the volute 3. The connecting shaft of the first motor 500 has a first end 501 and a second end 502, respectively. The second end 502 is connected to the second fan 400. The first end 501 is connected to a connecting plate, and the end of the first end 501 does not extend beyond the side of the blades 403 away from the second fan 400. Because the connecting plate is close to the first motor 500, the first end 501 of the connecting shaft of the first motor 500 can be shortened as much as possible. This reduces the length of the first end 501, improves the stability of the first fan 300 during rotation, prevents friction between the first fan 300 and the volute 3, and reduces noise.

[0489] As shown in Figures 167 to 178, in some embodiments, the connecting disk includes a clamping portion 411 and a mounting portion 412, the clamping portion 411 is located at the center of the mounting portion 412, and the blade 403 is provided on the clamping portion 411. The clamping portion 411 is in the shape of a disc, the mounting portion 412 is in the shape of a circular ring, and the mounting portion 412 is coaxially sleeved on the clamping portion 411. The clamping portion 411 and the mounting portion 412 are integrally formed to form a connecting disk. The connecting disk is coaxially mounted on the first end 501 of the connecting shaft of the first motor 500 through the supporting portion. The blade 403 is provided on the edge of the mounting portion 412 away from the first motor 500, and a plurality of blades 403 are provided at intervals along the circumference of the mounting portion 412, and the spacing between any two adjacent blades 403 is the same.

[0490] In some embodiments, a limiting surface is provided on the outer peripheral wall of the first end 501, and the limiting surface is a plane. A mounting hole is formed through the clamping portion 411, through which the first end 501 can pass. The cross-section of the mounting hole is the same as that of the first end 501. The first end 501 of the connecting shaft engages with the mounting hole via the limiting surface, thereby achieving synchronous rotation of the first fan 300 and the first end 501 of the connecting shaft of the first motor 500.

[0491] As shown in Figures 167 to 178 , in some embodiments, the mounting hole is coaxially opened on the side of the clamping portion 411 facing the first motor 500 , and the mounting hole passes through the clamping portion 411 along the thickness direction of the clamping portion 411 .

[0492] In some embodiments, the thickness of the clamping portion 411 in the direction away from the second fan 400 is greater than the thickness of the mounting portion 412 in the direction away from the second fan 400. The clamping portion 411 increases the length of the first end 501 of the connecting shaft of the first motor 500, thereby increasing the stability of the first fan 300 on the first end 501 of the connecting shaft.

[0493] In some embodiments, a side of the clamping portion 411 facing the first motor 500 is flush with a side of the mounting portion 412 facing the first motor 500 .

[0494] In some embodiments, to prevent the clamping portion 411 from being too thick, which would result in the first end 501 of the connecting shaft being too long, the thickness of the clamping portion 411 is less than five times the thickness of the mounting portion 412 .

[0495] As shown in Figures 167 to 180 , in some embodiments, a collar 600 is provided on the first end 501. The collar 600 fits against the side of the connection plate near the first motor 500. The collar 600 restricts the position of the first fan 300, preventing the first fan 300 from approaching the volute 3, which would cause contact and friction between the first fan 300 and the volute 3 to produce abnormal noise.

[0496] In some embodiments, an eighth mounting space 7000 is defined on the side of the connection disk facing the first motor 500, and the collar 600 is positioned within the eighth mounting space 7000. Accommodating the collar 600 within the eighth mounting space 7000 prevents the collar 600 from being positioned between the connection disk and the sidewall of the volute 3, thereby preventing friction between the collar 600 and the volute 3 and generating unusual noise. In the present disclosure, accommodating the collar 600 within the eighth mounting space 7000 further reduces the gap between the connection disk of the first fan 300 and the volute 3, further improving the rotational stability of the first fan 300.

[0497] In some embodiments, the depth of the eighth installation space 7000 is greater than the thickness of the collar 600. This ensures that the side of the collar 600 facing the first motor 500 does not protrude beyond the side of the mounting portion 412 facing the first motor 500. The first end 501 passes through the clamping portion 411, and the nut 800 and the collar 600 clamp the clamping portion 411. Clamping the clamping portion 411 by the nut 800 and the collar 600 further facilitates installation.

[0498] In some embodiments, the first end 501 is provided with a threaded section that passes through a connecting plate. A nut 800 is detachably attached to the threaded section, and the nut 800 and the retaining ring 600 clamp the connecting plate. During installation, the first end 501 of the connecting shaft of the first motor 500 is passed through the first fan 300 and the nut 800 is tightened onto the threaded section. During disassembly, the first fan 300 can be removed from the first end 501 of the connecting shaft by unscrewing the nut 800. This facilitates manual operation.

[0499] In some embodiments, a threaded section is formed on the outer peripheral wall of the first end 501 of the connecting shaft of the first motor 500. During installation, the first end 501 of the connecting shaft is passed through the volute 3 and the mounting hole in sequence, and the nut 800 is tightened on the threaded section so that the collar 600 and the nut 800 clamp the clamping portion 411.

[0500] In some embodiments, after the connecting shaft of the first motor 500 is connected to the first fan 300, the threaded section is partially located within the mounting hole. This provides a margin to ensure that the nut 800 can be further rotated after it abuts the clamping portion 411. This allows the distance between the nut 800 and the collar 600 to be slightly smaller than the thickness of the clamping portion 411, causing slight deformation of the clamping portion 411, thereby improving the tightness of the connection and preventing the first fan 300 from loosening.

[0501] As shown in Figures 167 to 178 , in some embodiments, the volute 3 includes a first half-shell 3001 and a second half-shell 3002, wherein the first half-shell 3001 is adjacent to the first motor 500. The second half-shell 3002 is disposed on a side of the first half-shell 3001 away from the first motor 500. The first fan 300 is disposed in a receiving cavity formed by the first half-shell 3001 and the second half-shell 3002.

[0502] In some embodiments, the volute 3 further includes a third half shell 3003 , which is disposed on a side of the second half shell 3002 away from the first half shell 3001 , and a ventilation duct is formed between the second half shell 3002 and the third half shell 3003 .

[0503] In some embodiments, a mounting cavity is provided on the volute 3, and a step 504 is provided on the first motor 500. The step 504 is inserted into the mounting cavity. The step 504 of the first motor 500 is inserted into the mounting cavity to complete the connection between the first motor 500 and the volute 3.

[0504] In some embodiments, the mounting cavity is defined on the side of the first half-shell 3001 facing the first motor 500. The thickness of the first half-shell 3001 is aligned with the axial direction of the first fan 300. The mounting cavity extends through the first half-shell 3001 along its thickness. A driving step 504 is provided on the side of the housing 503 of the first motor 500 facing the first half-shell 3001. The step 504 is coaxial with the connecting shaft of the first motor 500, allowing the connecting shaft to freely pass through and rotate on the step 504.

[0505] In some embodiments, the connection method between the first end 501 of the connecting shaft of the first motor 500 and the first fan 300 also includes a key connection, that is, a key slot is provided on the first end 501 of the connecting shaft or the inner wall of the mounting hole, and a key is inserted into the key slot to realize the connection between the first end 501 of the connecting shaft and the first fan 300.

[0506] In some embodiments, the first end 501 of the connecting shaft of the first motor 500 and the first fan 300 may also be connected by means of snap connection, interference connection, or the like.

[0507] In some embodiments, the connecting shaft is the output shaft of the first motor 500. The first motor 500 includes a housing, and the connecting shaft is disposed through and rotates in the housing. The two ends of the connecting shaft pass through the housing, respectively, and the two ends of the connecting shaft are a first end 501 and a second end 502. The first end 501 of the connecting shaft is connected to the first fan 300, and the second end 502 of the connecting shaft is connected to the second fan 400.

[0508] In some embodiments, the output shaft of the first motor 500 is connected to the second fan 400 , and the second fan 400 is connected to the first fan 300 via a connecting shaft.

[0509] The present disclosure also provides a wall-mounted air conditioner comprising: a housing 100, an indoor heat exchanger, a second fan 400, a volute 3, a first fan 300, and a first motor 500. The housing 100 has a first inner cavity and a second inner cavity defined along its length. The housing 100 has an indoor air inlet at the top and an indoor air outlet at the front bottom.

[0510] The indoor heat exchanger is disposed within the first inner cavity and exchanges heat with the air passing through it to form a heat exchange airflow. A second fan 400 is disposed within the first inner cavity, positioned below the indoor heat exchanger. Indoor airflow enters the housing 100 through the indoor air inlet, exchanges heat in the indoor heat exchanger, and is then output through the indoor air outlet.

[0511] The volute 3 is disposed within the second inner cavity and is provided with a first air inlet and a first air outlet. The volute 3 is disposed at one end of the second fan 400. A receiving chamber is disposed within the volute 3. The direction in which the volute 3 moves away from the second fan 400 is defined as a first direction. The width of the receiving chamber along the first direction is defined as a set width. The first fan 300 is disposed within the volute 3.

[0512] The first motor 500 drives the second fan 400 and the first fan 300 to rotate synchronously. The first motor 500 and / or the second fan 400 are connected to the first fan 300 via a connecting shaft. The length of the connecting shaft within the accommodating cavity is less than one-third of the set width.

[0513] Through the above solution, the connecting disk is close to the first motor 500, so the first end 501 of the connecting shaft of the first motor 500 can be shortened as much as possible to reduce the length of the connecting shaft in the volute 3, thereby improving the stability of the first fan 300 during rotation, avoiding friction between the first fan 300 and the volute 3, and reducing noise.

[0514] In some embodiments, the length of the connecting shaft in the accommodating cavity is greater than one-third of the height of the first fan 300. Through the above solution, the length of the connecting shaft is ensured not to be too short, and the stability of the connection between the first fan 300 and the connecting shaft is ensured.

[0515] Please refer to Figure 182. The length of the connecting shaft in the accommodating cavity is F, the set width is Y, and F<Y / 3.

[0516] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

[0517] Those skilled in the art will understand that the disclosure scope of this application is not limited to the above specific embodiments, and certain elements of the embodiments may be modified and replaced without departing from the spirit of this application. The scope of this application is limited by the appended claims.

Claims

1. An air conditioner, comprising: A shell, wherein a first inner cavity and a second inner cavity are arranged inside the shell along the length direction; a second air inlet is opened at the top of the shell, and a second air outlet is opened at the front bottom of the shell; An indoor heat exchanger, wherein the indoor heat exchanger is disposed in the first inner cavity, and the indoor heat exchanger performs heat exchange on the air passing through the indoor heat exchanger to form a heat exchange airflow; a second fan, the second fan being arranged in the first inner cavity, and the second fan being arranged below the indoor heat exchanger; indoor airflow enters the housing through the second air inlet under the action of the second fan, and is output to the room through the second air outlet after heat exchanged by the indoor heat exchanger; A volute, the volute is disposed in the second inner cavity, and a first air inlet and a first air outlet are formed on the volute; a first fan, the first fan being disposed in the volute; A first motor, wherein the first motor is disposed on a side of the second fan away from the first fan; the first motor is configured to drive the second fan to rotate; as well as A connecting shaft, two ends of which are coaxially connected to the first fan and the second fan respectively; the connecting shaft is integrally formed with the first fan and / or the second fan; Wherein, when the first motor drives the second fan to rotate, the second fan drives the first fan to rotate synchronously through the connecting shaft; The distance between the end of the first fan facing the second fan and the inner wall of the volute is L1, the axial thickness of the first fan is L2, and L1=L2 / 5.

2. The air conditioner according to claim 1, wherein: The first fan includes a first hub and a plurality of first blades; the plurality of first blades are arranged at intervals along an edge of the first hub; and the first hub is coaxially arranged with the connecting shaft.

3. The air conditioner according to claim 2, wherein: A first boss is coaxially connected to a side of the first hub facing the second fan; the connecting shaft is coaxially connected to the first boss, and the first boss is integrally formed with the first hub and the connecting shaft.

4. The air conditioner according to claim 3, wherein: The diameter of the first boss is at least three times the diameter of the connecting shaft.

5. The air conditioner according to claim 3, wherein: The outer peripheral wall of the first boss is provided with a first reinforcing rib; a plurality of the first reinforcing ribs are arranged at intervals around the axis of the first boss, and the first reinforcing ribs are connected to the first hub.

6. The air conditioner according to claim 3, wherein: A second boss is disposed on a side of the first hub away from the first boss, and the second boss is coaxial with the first boss.

7. The air conditioner according to claim 6, wherein: An end of the first boss away from the first hub does not exceed an end of the first blade away from the first hub.

8. The air conditioner according to claim 1, wherein: The second fan includes a second hub and a plurality of second blades; the plurality of second blades are arranged at intervals along the edge of the second hub; and the second hub and the connecting shaft are integrally formed.

9. An air conditioner, comprising: A shell, wherein a first inner cavity and a second inner cavity are arranged inside the shell along the length direction; a second air inlet is opened at the top of the shell, and a second air outlet is opened at the front bottom of the shell; An indoor heat exchanger, wherein the indoor heat exchanger is disposed in the first inner cavity, and the indoor heat exchanger performs heat exchange on the air passing through the indoor heat exchanger to form a heat exchange airflow; a second fan, the second fan being arranged in the first inner cavity, and the second fan being arranged below the indoor heat exchanger; indoor airflow enters the housing through the second air inlet under the action of the second fan, and is output to the room through the second air outlet after heat exchanged by the indoor heat exchanger; A volute, the volute is disposed in the second inner cavity, and a first air inlet and a first air outlet are formed on the volute; a first fan, the first fan being disposed in the volute; A first motor, wherein the first motor is disposed on a side of the second fan away from the first fan; the first motor is configured to drive the second fan to rotate; an end cover, the end cover being arranged on a side of the second fan facing the first fan; and A connecting shaft, the two ends of which are coaxially connected to the first fan and the end cover respectively; the connecting shaft, the first fan and the end cover are integrally formed; Wherein, when the first motor drives the second fan to rotate, the second fan drives the first fan to rotate synchronously through the connecting shaft; The distance between the end of the first fan facing the second fan and the inner wall of the volute is L1, the axial thickness of the first fan is L2, and L1=L2 / 5.

10. The air conditioner according to claim 9, wherein: The end cover and the second fan are integrally formed.

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